Creating Baked Tuna Stuffed Peppers can be straightforward if you follow these simple steps:

1. Preheat Oven: Preheat your oven to 375°F (190°C).
2. Prepare Peppers: Cut the tops off the bell peppers and remove the seeds and membranes.
3. Mix Filling: In a large bowl, combine the drained tuna, cooked rice, diced tomatoes, chopped onion, mayonnaise, lemon juice, garlic powder, Italian herbs, salt, and pepper. Stir until well combined.
4. Stuff Peppers: Spoon the tuna mixture into each bell pepper, filling them generously.
5. Top with Cheese: Sprinkle shredded cheese over the filled peppers, ensuring to cover the tops.
6. Arrange in Baking Dish: Place the stuffed peppers upright in a baking dish. If they don’t stand up well, you can trim the bottoms slightly.
7. Cover with Foil: Cover the dish with aluminum foil to keep moisture in while they bake.
8. Bake: Place the dish in the preheated oven and bake for about 25-30 minutes, or until the peppers are tender.
9. Remove Foil: Take off the foil and bake for an additional 5-10 minutes to brown the cheese slightly.
10. Serve: Once done, remove from the oven and let them cool for a few minutes before serving.

This step-by-step method ensures your Baked Tuna Stuffed Peppers turn out deliciously every time!