Cheddar-Stuffed Turkey Burgers

YUM!

1 pound ground turkey meat
1 small vidalia or other sweet onion, finely chopped (I used Tastefully Simple Onion Onion...we're not big onion eaters)
1 tsp Worcestershire sauce
1/2 tsp salt
1/8 tsp fresh ground pepper
1/2 cup shredded sharp cheddar cheese
4 English muffins, split
4 Romaine lettuce leaves, trimmed
4 tomato slices

-In a medium bowl, combine the turkey, onion, Worcestershire sauce, salt and pepper; mix well to combine. Divide and shape the mixture into 4 balls. With your finger make a deep indentation into each ball. Fill each hole with 2 tablespoons of the cheese. Pinch the meat closed to cover the cheese and shape each ball into a 3/4-inch-thick patty.

-Toast the English muffins. spray a nonstick skillet with cooking spray and heat over medium-high heat. Cook burgers 7-8 minutes per side.

-Place the English muffin bottoms on 4 plates. Top each with 1 lettuce leaf, 1 tomato slice and a burger. Place the muffin tops on each burger.