In a large skillet over medium heat, add the ground beef or turkey. Cook until browned, breaking it apart with a spoon as it cooks. Drain excess fat if necessary.

Add the diced onion and minced garlic to the skillet with the meat. Sauté for about 3-4 minutes until the onion is translucent. Next, mix in the chopped bell peppers and cook for another 2-3 minutes.

Pour in the Sloppy Joe sauce, stirring until the meat and vegetables are well coated. Allow the mixture to simmer for 5-10 minutes, so the flavors meld together. Season with salt and pepper to taste.

While the meat simmers, preheat your oven according to the garlic bread package instructions. Place the slices on a baking sheet and bake until golden and crispy.

In a large baking dish, start by laying down half of the garlic bread slices as a base. Spoon the Sloppy Joe mixture over these slices, ensuring even coverage.

Sprinkle the shredded cheese evenly over the Sloppy Joe mixture. Now, layer the remaining garlic bread slices on top of the cheese.

Return the assembled casserole to the oven. Bake for an additional 10-15 minutes, or until the cheese is bubbling and slightly golden.

Once out of the oven, let the casserole cool for a few minutes. Garnish with fresh parsley before serving.