1. Mix the spaghetti sauce and lentils in a bowl and set aside.2. Mix the ricotta with the pesto in a bowl and set aside.3. Mix the peppers and the herbs in a bowl and set aside.4. Pour one-third of the spaghetti sauce mixture into an oven-proof dish.5. Lay 4 lasagna noodles on top.6. Add the sliced pepper and herb mixture7. Add the second-third of the spaghetti sauce mixture8. Add a second layer of 4 lasagna noodles.9. Layer the pesto ricotta and sliced mushrooms.10. Add a final layer of 4 lasagna noodles.11. Add the remaining spaghetti sauce mixture12. Sprinkle the shredded cheese (Mozzarella and Parmesan) on top.13. Bake at 350℉ for approximately 1 hour.