Pepper Burgers

Ingredients

• 1 lb. ground beef
• 1/2 c. short, thin green pepper strips
• 1/2 c. yellow bell pepper strips
• 1 small garlic clove, minced
• 1/4 tsp. dried oregano leaves
• 1 1/2 tsp. olive oil
• 1/8 tsp. salt
• 4 onion rolls, toasted
• 4 (1 oz.) slices Mozzarella cheese