Creating Leftover Chili Spaghetti Pie Casserole is a breeze when you follow these easy steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C).
2. Grease the Casserole Dish: Lightly grease a 9×13 inch casserole dish with olive oil to prevent sticking.
3. Mix the Base: In a large bowl, combine the cooked spaghetti, chili, ricotta cheese, and egg. Stir until everything is well incorporated.
4. Season the Mixture: Add garlic powder, onion powder, salt, and pepper to taste. Mix again to evenly distribute the seasonings.
5. Layer the Ingredients: Pour half of the spaghetti mixture into the greased casserole dish. Spread it evenly.
6. Add Cheese: Sprinkle half of the shredded cheddar cheese over the first layer of spaghetti.
7. Repeat the Layers: Add the remaining spaghetti mixture on top of the cheese layer, spreading it evenly. Top with the rest of the cheddar cheese.
8. Bake: Place the casserole in the preheated oven and bake for 25-30 minutes, or until the cheese is bubbly and golden.
9. Cool: Allow the casserole to cool for about 5-10 minutes before serving to let it set.
10. Garnish and Serve: Garnish with freshly chopped parsley or basil, if desired, and serve hot.

This step-by-step guide makes it easy to create Leftover Chili Spaghetti Pie Casserole that’s both satisfying and delicious.