Cabbage Casserole

Name: Cabbage Casserole
Ingredients: ¼ cup white rice, uncooked; 1 head cabbage, sliced into ½-inch slices; 1 pound 80-20 ground beef; ¾ stick unsalted butter; 1 small yellow onion, chopped (about 1 cup); 1 green bell pepper, chopped (about ½ cup); 1 red bell pepper, chopped (about ½ cup); 2 celery stalks, chopped (about ½ cup); 3 garlic cloves, finely chopped; 1 cup heavy cream; ½ pound sharp cheddar cheese; 1 tablespoon kosher salt; 1 teaspoon freshly ground black pepper