Beef Stroganoff Sandwiches

Ingredients

• 2 lbs. ground beef
• 1/2 c. chopped onion
• 1 tsp. salt
• 1/2 tsp. garlic powder
• 1/2 tsp. pepper
• butter or margarine, softened
• 2 c. (16 oz.) sour cream
• 2 tomatoes, seeded and diced
• 1 large green pepper, diced
• 3 c. (12 oz.) shredded Cheddar cheese
• 1 loaf French Bread