Preheat oven to 400 F. Place hot dogs onto a baking sheet. Bake for 12-15 minutes. Spread 1 tablespoon mayonnaise between each hot dog bun.
Place hot dog on top of mayo, and drizzle 1 tablespoon of barbecue sauce over each hot dog. Sprinkle each with shredded cheddar cheese and french fried onions.