Louisiana Spicy Fried Cabbage

2 pounds finely diced cabbage
1 pound finely chopped bacon
1 medium onion
2 tablespoons red pepper flakes
1/2 teaspoon salt (optional)
1/2 teaspoon black pepper

Fry bacon until crisp and well browned. Add chopped onion and stir until limp. Add pepper flakes, cabbage, salt and pepper, stirring well so that all the cabbage is coated. Cover and cook over low heat until cabbage is limp and tender.