1-First Step: Preheat your oven to 350°F (175°C). Prepare all ingredients by dicing the onions and bell peppers and measuring sauces and seasonings to streamline the cooking process.

2-Second Step: In a large skillet over medium heat, cook the ground beef or protein substitute until browned, breaking it apart as it cooks to ensure even texture. Drain excess fat if necessary, especially for higher-fat meats.

3-Third Step: Add diced onions and green bell peppers to the skillet, sautéing until softened about 5 minutes. This step enhances the flavor foundation of the casserole.

4-Fourth Step: Stir in tomato sauce, tomato paste, Worcestershire sauce, chili powder, garlic powder, salt, and pepper. Mix thoroughly and simmer for 5-7 minutes to allow flavors to meld.

5-Fifth Step: Transfer the mixture to a greased casserole dish and flatten the top for even cooking.

6-Sixth Step: Optionally, sprinkle shredded cheese or vegan cheese alternative on top for added flavor and texture.

7-Final Step: Bake uncovered in the preheated oven for 20-25 minutes until bubbly and heated through. Allow cooling slightly before serving. For adaptations, vegan versions omit cheese or use dairy-free alternatives; gluten-free adjustments use suitable sauces. Timing may vary slightly with different protein choices.