Three-Bean Barbecue Bake

Ingredients

• 2 teaspoons vegetable oil
• 1 1/2 cups chopped onion
• 1 cup chopped green pepper
• 1 cup chopped sweet red pepper
• 2 cloves garlic, minced
• 3/4 cup low-sodium ketchup
• 1/2 cup firmly packed brown sugar
• 1/4 cup molasses
• 1 tablespoon cider vinegar
• 1 teaspoon dry mustard
• 1 (16-ounce) can Great Northern beans, drained
• 1 (16-ounce) can no-salt-added kidney beans, drained
• 1 (16-ounce) can lima beans, drained
• Vegetable cooking spray