Beef Mushroom Burger

Ingredients
8 oz. mushrooms
1 tbsp. Worcestershire sauce
12 oz. ground beef sirloin (90% lean)
1/4 c. grated onion, squeezed dry
1/4 tsp. pepper
1 tbsp. canola oil
4 slices American or Cheddar cheese
toasted buns
Lettuce
tomato
Directions
In food processor, pulse mushrooms and Worcestershire sauce until finely chopped; combine with beef and onion. Form mixture into 4 patties (about 4" wide); sprinkle all over with pepper.
In a 12" nonstick skillet, heat canola oil on medium; add patties. Cook 5 minutes. Turn patties over; increase heat to medium-high. Top each patty with cheese. Cook 4 minutes or until cheese melts. Serve on toasted bun with lettuce and tomato.