01 -
If your dish works under a broiler, put it about 15 cm below for just a minute or two till cheese turns lightly brown and melty.
02 -
Take the pan off the heat. Mix in mayo, mustard, ketchup, and 1 cup (113 g) of cheddar cheese until well blended.
03 -
Set the oven to 204°C. Spray a 1.9 L baking dish lightly with olive oil.
04 -
Put olive oil in a wide pan, warm it on medium-high for 2 minutes. Toss in onions and ground beef.
05 -
Throw in pepper, garlic, and kosher salt. Stir and cook for a few minutes so the flavors mix well.
06 -
Spread the beef mix into the baking dish evenly. Top it with the rest of the cheddar cheese.
07 -
Cook and break up the beef while stirring for about 5 minutes until it’s browned and onions are soft. Drain any juice that shows up and go back to the pan.
08 -
Put it in the oven for 15 minutes until everything’s heated and cheese melts smooth.