INGREDIENTS
1/4 cup
ketchup, plus more for the top
1
egg
2 tsp
Worcestershire sauce
1
+ ½ pounds ground sirloin or a meatloaf mix of beef, pork & veal
1/3 cup
diced onion
1/3 cup
seasoned bread crumbs
1 tbsp
fresh chopped parsley
1/2 tsp
chili powder
1/2 tsp
dried oregano
1/4 tsp
garlic powder, plus more for the top
sea or kosher salt and fresh black pepper
1 cup
shredded white cheddar
1 cup
shredded mozzarella cheese
onion powder, for sprinkling on top