In a large pot, boil water for the lasagne noodles then cook as suggested on the package (if needed to pre-cook noodles)
Preheat your oven to 425F
Dice your onions, carrots, peppers, and celery then add then to a large pan with avocado oil. Sauté for 8-10 minutes.
Add your spices and garlic and cook for 2 minutes. Then add your spinach and cook for 3-5 min (until incorporated and the spinach is wilted)
Mix in the lentils and cook for another 1-2 minutes
Now’s the fun part: assemble your lasagna!! First, spread a thin layer of your tomato sauce (½ cup) on the bottom of a baking dish (I used 9 x13) to form a small layer, layer lasagna noodles on top of the sauce
Top with ½ of the lentil filling then add 1 ¼ cups of tomato sauce on top. Add another layer of lasagna noodles then the rest of the lentil mixture
Finally, add another 1 ¼ cups of tomato sauce then another layer of noodles. Top with the final amount of tomato sauce and sprinkle with the mozzarella
Cover the dish (either a lid or aluminum foil) and bake covered for 25 minutes. Rotate then cook for another 5-10 minutes, uncovered. The corners should be steaming and bubbly.
Let the lasagne cool for 25 minutes before slicing
Storage: airtight container in the fridge up to 4 days