This is enough for 4 servings:
90% lean ground beef (about 1 pound)
1 large red onion
Worcestershire sauce
1/2-1 Cup Cheddar Cheese
Paprika
Pepper
Canola Oil
Burger Buns
Directions
Preheat grill to medium-high or preheat the oven to 400 degrees Fahrenheit.
In a bowl combine the chedder cheese and the chopped onion.
Gently mix the beef, Worcestershire ( I used 4 tablespoons, but it really depends on your taste), paprika (2 teaspoons) and pepper( 1/2 teaspoon) in a large bowl. Mix with your hands, but don't overwork.
Shape the beef into 8 thin, 4-inch-wide patties. Place 2 tablespoons of the Cheddar cheese/onion mixture on each of 4 patties, leaving a 1/2-inch border, (I added 1 teaspoon of worcestershire sauce as well). Cover each with one of the remaining patties. Crimp the patty to make sure mixture is fully enclosed and seal the edges closed.
To grill: Grill the stuffed patties in a pan over medium-high heat, about 4 minutes per side for medium-well. (Do not press the burgers down as they cook or they'll split and come apart and the cheese will ooze out.)
To broil: Cover a broiler pan with foil and coat with cooking spray. Broil the stuffed patties in the upper third of the oven, about 4 minutes per side for medium-well.
In both these cases, once the burger patty is done, let it stand for 5 minutes before serving.
If you can handle it, you can cheat and buy ready made burger patty's, spoon the filling into the centre of one ready made burger beef patty and place the other one on top, pinch edges to make sure the burgers are firmly together and cook as above. This does result in a bigger burger, not for the faint hearted! If you do this, it would look like the burger below :) .....