Fried Cabbage with Sausage

• 1 stick butter or margarine
• 1 small head of cabbage, chopped
• 1 small green pepper, chopped or cut into strips
• 1 small onion, chopped
• 1 pound polish sausage, sliced into round pieces
• 1 (15 oz) can diced tomatoes
• 1/2 tsp salt
• 1/2 tsp pepper
• hot sauce (optional)