It's dinner time!

Ingredients

• 2 tablespoons vegetable oil
• 1 cup chopped onion
• 2 (8 ounce) cans diced tomatoes
• 1 (8 ounce) can tomato sauce
• 1 clove garlic, minced
• 1 (14 ounce) can refried beans
• ½ cup chopped onion
• ¾ cup sliced black olives, divided
• ¾ cup shredded Mexican cheese blend, divided
• 8 (8 inch) flour tortillas