<human>:  What is a good recipe for lasagna?
<bot>: 
1. Preheat oven to 375°F (190°C).
2. Spread 1/2 cup of your favorite marinara sauce in a 9x13 inch baking dish.
3. Layer 4-5 lasagna noodles on top.
4. Spread 1/2 of the ricotta cheese mixture over the noodles.
5. Top with 1/3 of mozzarella cheese.
6. Place 2-3 more noodles on top and spread with 1/2 of the remaining sauce.
7. Top with remaining ricotta cheese, then another layer of noodles.
8. Spread remaining sauce and top with remaining mozzarella cheese.
9. Sprinkle with Parmesan cheese.