INGREDIENTS
1 lb
lean ground beef
1
medium onion (,chopped)
1 tsp
vegetable oil
1 tbsp
Worcestershire sauce
1 cup
ketchup
2 tbsp
brown sugar
1/8 tsp
salt
1/8 tsp
black pepper
1 cup
cheddar cheese (,shredded)
12
slider buns (,cut in half)
2 tbsp
butter (,melted)
2 tbsp
parmesan cheese (,grated)