Ingredients
Cooking spray
1/2 cup chopped onion
6 tablespoons ketchup, divided
1/2 cup panko (Japanese breadcrumbs)
1/4 cup chopped fresh flat-leaf parsley
1 teaspoon Worcestershire sauce
3/4 teaspoon dried oregano
1/4 teaspoon salt
1/4 teaspoon freshly ground black pepper
1 pound ground sirloin
1 large egg white
Preparation
