Creating Oven-Baked Cheesy Tacos is a simple process if you follow these steps:

1. Preheat Your Oven: Set your oven to 375°F (190°C) to get it ready for baking.
2. Cook the Meat: In a skillet over medium heat, brown the ground beef until fully cooked. Drain any excess fat.
3. Add Taco Seasoning: Stir in the taco seasoning and a little water as directed on the seasoning packet. Cook for an additional 5 minutes.
4. Prepare the Filling: In a large mixing bowl, combine the cooked meat, refried beans, corn, black beans, and chopped bell peppers. Mix well.
5. Fill the Taco Shells: Place the taco shells upright in a baking dish. Spoon the filling into each shell, packing it tightly.
6. Top with Cheese: Generously sprinkle shredded cheese over each filled taco.
7. Bake: Transfer the baking dish to the preheated oven. Bake for 15-20 minutes, until the cheese is melted and bubbly.
8. Remove and Cool: Carefully take the dish out of the oven and let it cool for a few minutes.
9. Add Salsa: Spoon salsa over the baked tacos for added flavor.
10. Garnish and Serve: Top with sour cream, chopped cilantro, and any additional toppings you desire.

These steps will lead you effortlessly to an incredible batch of Oven-Baked Cheesy Tacos, sure to dazzle your taste buds.