Preheat your oven to 375 degrees Fahrenheit. Line a 9x13 baking pan with aluminum foil for easy cleanup. Arrange the hot dog buns in the pan so they fit snugly.

Add your desired amounts of mustard, ketchup, and relish to the bottom of each bun. Then, place a hot dog inside each bun.

Spoon about 1/3 cup of chili onto each hot dog, and then sprinkle shredded cheddar cheese and chopped onion over them.

Cover the pan with foil and bake for 30 minutes.

Afterward, let the dish stand for 5 minutes, and gently remove the foil. Carefully use a spatula to take the hot dogs out of the pan.

Top with your preferred extras like more relish, mustard, and ketchup. Enjoy this delectable treat!