Mini cheeseburgers with fried onions
500g Beef mince
1 tbsp Dijon mustard
1 ½ tbsp Olive oil
1 Onion, thinly sliced
10 Small slices cheddar cheese
10 Small burger buns, halved
2 cups Shredded iceberg lettuce
10 slices Tomato
To serve Ketchup or barbeque sauce