1In a small bowl, combine mayonnaise and minced garlic. Cover, and refrigerate. Preheat oven to 500 degrees F (260 degrees C).
2Heat oil in a large skillet over medium heat. Saute beef until lightly browned. Stir in green pepper and onion, and season with salt and pepper. Saute until vegetables are tender, and remove from heat.
3Spread each bun generously with garlic mayonnaise. Divide beef mixture into the buns. Top with shredded cheese, and sprinkle with oregano. Place sandwiches on a baking pan.
4Heat sandwiches in preheated oven, until cheese is melted or slightly browned.
Footnotes
Tip
Aluminum foil can be used to keep food moist, cook it evenly, and make clean-up easier.