Meatloaf Grilled Cheese

INGREDIENTS:
For the Meatloaf:

1 pound ground beef
1 cup breadcrumbs
1/2 cup milk
1/2 cup onion, finely chopped
1/2 cup bell pepper, finely chopped
2 cloves garlic, minced
1/4 cup ketchup
1 tablespoon Worcestershire sauce
1 teaspoon dried oregano
Salt and black pepper to taste
For the Grilled Cheese:

Sliced bread
Butter, softened
Sliced cheddar cheese
Sliced mozzarella cheese