Start by preheating your oven to 375°F (190°C). In a large skillet, heat 1 tablespoon of olive oil over medium heat. Add the chopped onions, green bell pepper, and red bell pepper. Sauté them for about 5 minutes, or until the vegetables are soft and fragrant. This step adds flavor and softens the texture.
Next, add the ground beef to the skillet with the vegetables. Break it apart with a spoon and cook until fully browned, around 7–10 minutes. Drain off any extra fat to keep the casserole from becoming greasy. The browned beef will absorb more flavor from the sauce, so make sure it’s fully cooked and crumbly.
Once the beef is ready, stir in the sloppy joe sauce and drained corn. Cook the mixture for another 2–3 minutes until everything is evenly combined and heated through. Season with salt and pepper according to taste. This is your rich, saucy base that forms the heart of the casserole.
Transfer the meat mixture into a greased 9x13-inch baking dish. Open the biscuit dough and cut each biscuit into quarters. Arrange these biscuit pieces evenly over the top of the meat mixture. This layer will puff up and turn golden during baking, forming a delicious crust.
Place the casserole in the oven and bake for 25 minutes, or until the biscuits are golden brown and cooked through. Carefully remove the dish from the oven and sprinkle shredded cheddar cheese all over the top. Return the casserole to the oven for another 5 minutes, just until the cheese melts beautifully.
Take the casserole out and let it cool for a few minutes before serving. This helps the flavors settle and makes it easier to scoop. Serve warm, and enjoy with a fresh salad or simple green veggie on the side if you like.