Name: Spinach Pesto Lasagna (Keto Friendly) Recipe
Prep time: 20 min
Cook time: 35 min
Total time: 55 min
Cuisine: Italian
Ingredients: ½ cup walnuts; 1 cup fresh basil; 4 cups fresh spinach; 3 tbsp olive oil; 1 lemon, zest and juice; ½ tsp salt; ¼ tsp pepper; 1 tbsp garlic, minced; ¼ tsp red pepper flakes; ¼ cup water; 9 oz lasagna noodles (gluten free almond flour pasta or regular noodles); 15 oz ricotta (low fat or regular), divided; 2 cups mozzarella cheese, divided; 6 cherry tomatoes, halved

Jump to Recipe·4 from 235 reviews

If you’re searching for an irresistibly fresh and comforting dish that fits perfectly into a low-carb lifestyle, look no further than this Spinach Pesto Lasagna (Keto Friendly) Recipe. It’s one of those meals that feels indulgent yet nourishing, combining vibrant spinach basil pesto with creamy ricotta, gooey mozzarella, and the subtle crunch of toasted walnuts. Whether you’re following keto strictly or just want to enjoy a lighter take on classic lasagna, this recipe brings incredible flavor and color to your dinner table while keeping the carbs in check.

Ingredients You'll Need

A white round baking dish filled with a creamy white sauce mixed with green spinach evenly spread inside. On top, there are seven bright red cherry tomatoes placed in a scattered pattern, contrasting with the creamy spinach layer. The dish sits on a white marbled surface with a striped cloth partially visible at the bottom. The edges of the dish have ridges and handles. Photo taken with an iphone --ar 4:5 --v 7

The beauty of this Spinach Pesto Lasagna (Keto Friendly) Recipe lies in its simplicity and the quality of the ingredients. Each component plays a vital role—from the brightness of fresh basil and spinach to the creamy richness of the ricotta and mozzarella cheeses. Using almond flour lasagna noodles keeps it keto without sacrificing texture or taste.

Walnuts, ½ cup: Toasted to add a toasty depth and subtle crunch to the pesto.
Fresh basil, 1 cup: Essential for that classic pesto aroma and bright, herbal flavor.
Fresh spinach, 4 cups: Adds vivid green color and an earthy, mild flavor to the sauce.
Olive oil, 3 tbsp: Gives pesto its silky texture and rich mouthfeel.
Lemon zest and juice: Brings a lively, fresh acidity that balances the pesto’s richness.
Salt, ½ teaspoon and pepper, ¼ tsp: Enhances all the natural flavors.
Garlic, 1 tablespoon minced: Adds a gentle punch of savoriness.
Red pepper flakes, ¼ tsp: Offers a subtle spicy kick to keep things interesting.
Water, ¼ cup: Helps blend the pesto to a smooth, spreadable consistency.
Lasagna noodles, 9 oz: Choose almond flour gluten-free sheets for keto or regular noodles if you prefer.
Ricotta cheese, 15 oz (divided): Brings creaminess and mild tang that melts beautifully within the layers.
Mozzarella cheese, 2 cups (divided): Provides that perfect gooey stretch and golden top layer.
Cherry tomatoes, 6 halved: Add a pop of sweetness and color on top.

How to Make Spinach Pesto Lasagna (Keto Friendly) Recipe

Step 1: Prepare Your Oven and Casserole Dish

Start by preheating your oven to 350 degrees Fahrenheit and have your 8×11-inch oven-safe casserole dish ready. This is the perfect size for layering three beautiful tiers of lasagna noodles and that luscious spinach pesto filling you'll be making next.

Step 2: Prep Your Lasagna Noodles

Depending on the noodles you’re using, check the package instructions carefully. Some almond flour or gluten-free lasagna sheets don’t require boiling, which saves time and keeps the noodles perfectly firm after baking. If you’re using traditional noodles, you’ll want to boil them until al dente first. Pro tip: cutting sheets to fit your casserole snugly helps keep your layers even.

Step 3: Make the Spinach Basil Pesto

Toasting the walnuts in a skillet on medium-low heat until fragrant brings out their best flavor. Then, blend those toasted walnuts with fresh basil, spinach, olive oil, lemon zest and juice, garlic, salt, pepper, red pepper flakes, and water in a food processor until smooth. This vibrant pesto is what makes this Spinach Pesto Lasagna (Keto Friendly) Recipe truly shine.

Step 4: Assemble the First Layer

Spread half a cup of pesto evenly across the bottom of your casserole dish as the flavorful foundation. Add a flat layer of lasagna noodles next, trimming as needed. Top with half the ricotta, a quarter cup of pesto, and a quarter cup of mozzarella. This layering sets up the luscious, cheesy texture you’re craving.

Step 5: Build the Second Layer

Repeat with another layer of noodles followed by the remaining ricotta, half of the remaining pesto, and half the remaining mozzarella. Each layer adds depth and richness to the lasagna, so don’t rush this part—it’s worth every bit of care.

Step 6: Finish With the Top Layer

Cover with the final lasagna noodle layer, then spread the last of the pesto and mozzarella on top. Press cherry tomato halves cut side down over the cheese for a juicy burst of color and flavor when baked.

Step 7: Bake to Perfection

Cover the dish with foil and bake at 350 degrees Fahrenheit for 30 minutes. Then remove the foil to let the cheese on top brown and bubble for an extra 5 minutes. Let it cool slightly before slicing so the layers firm up just right—now you’re ready to enjoy your fabulous Spinach Pesto Lasagna (Keto Friendly) Recipe!

How to Serve Spinach Pesto Lasagna (Keto Friendly) Recipe

A large white oval ceramic dish is shown with a thin, uneven layer of bright green pesto spread across the bottom and sides, with visible texture from small bits of herbs. A blue rubber spatula with a wooden handle rests inside the dish, partly covered in pesto. To the upper right, there is a clear glass bowl filled with more green pesto. The background is a white marbled surface. Photo taken with an iphone --ar 4:5 --v 7

Garnishes

A sprinkle of freshly grated Parmesan cheese or a few basil leaves on top adds a final flourish that’s both tasty and pretty. A drizzle of extra virgin olive oil just before serving will boost the richness and shine.

Side Dishes

Light and fresh sides complement this hearty lasagna beautifully—think crisp mixed greens with a lemon vinaigrette, or roasted asparagus spears shimmering with olive oil and a squeeze of lemon. These sides keep your meal balanced and vibrant.

Creative Ways to Present

For a special occasion, serve individual portions in mini casserole dishes or ramekins. Layer it like a lasagna parfait, showing off the colorful layers through glass. It’s a fun twist that’s sure to impress your family and friends.

Make Ahead and Storage

Storing Leftovers

This Spinach Pesto Lasagna (Keto Friendly) Recipe keeps beautifully in the refrigerator. Cover tightly with foil or plastic wrap and enjoy leftovers within 3 to 4 days. The flavors meld wonderfully overnight, making second-day servings even tastier.

Freezing

If you want to savor this lasagna later, freeze it after baking and cooling completely. Wrap it tightly in foil and place it in an airtight container or freezer bag. It freezes well for up to 2 months without compromising taste or texture.

Reheating

Reheat your frozen or refrigerated lasagna in the oven at 350 degrees Fahrenheit, covered lightly with foil to prevent drying out. Heat for about 20 minutes, uncovering near the end to revive that golden melted cheese top. Alternatively, microwave portions for a quick meal.

FAQs

Can I make this lasagna completely dairy-free?

While this recipe shines with ricotta and mozzarella, you can swap in dairy-free cheeses or use nut-based ricotta alternatives to keep it dairy-free. Just keep in mind the texture and flavor might vary slightly.

Is it necessary to toast the walnuts for the pesto?

Toasting walnuts enhances their nuttiness and adds an extra layer of flavor, but if you’re short on time, you can skip this step. Raw walnuts will still work, just with a milder taste.

Can I substitute the almond flour noodles with zucchini slices?

Absolutely! Thinly sliced, roasted zucchini can make a delicious, even lower-carb noodle replacement. Layer them the same way you would the lasagna sheets for a lighter twist.

How spicy is this Spinach Pesto Lasagna (Keto Friendly) Recipe?

The red pepper flakes add just a subtle hint of heat to balance the creamy and fresh flavors—you can always adjust the amount to suit your taste, or omit them completely for mildness.

Can this recipe be doubled for a larger group?

Yes, just double the ingredient quantities and use a larger casserole dish or bake in two dishes. You may need to increase baking time slightly if you make a much thicker lasagna layer.

Final Thoughts

This Spinach Pesto Lasagna (Keto Friendly) Recipe is truly a gem for anyone who loves vibrant flavors, creamy textures, and the comfort of a good lasagna without the carb overload. I encourage you to give it a try—it’s a guaranteed crowd-pleaser whether you’re cooking for your family or surprising guests with something fresh and unforgettable. Once you taste this dish, it’ll likely become a beloved staple in your kitchen, just like it did in mine!