Bite-Sized Burgers with Crispy Fried Onions: The Perfect Snack for Game Day or Any Occasion.
To cook:
Combine the beef with the mustard and some salt and pepper and mix to combine.
Form into 10 patties and refrigerate for 30 minutes.
Place 1 tablespoon of olive oil into a frying pan over moderate heat and add the sliced onion.
Cook for 15–20 minutes or until nicely colored and crispy, stirring occasionally.
Preheat a chargrill to moderately high.
Brush the patties with the remaining oil and cook for 2 ½ minutes.
Turn over, place a cheese slice on top of each patty, and cook for a further 2 ½ minutes or until cooked through. Set aside.
To serve: Top the bottoms of the buns with the lettuce and tomato, then place a patty on top. Add the onions and a squirt of sauce. Place the top bun and serve.