Crockpot French Onion Meatloaf

Crockpot French Onion Meatloaf with Melted Swiss Cheese
Ingredients:
3-4 large sweet onions, sliced
4 tablespoons salted butter
1 teaspoon salt
½ teaspoon black pepper
½ teaspoon garlic powder
½ teaspoon onion powder
1 pound ground beef
1 cup breadcrumbs