Ingredients:

1 1/2 Tbsp oil
1 1/3 lb regular ground beef (70% lean)
1/4 tsp each salt and black pepper
2 tsp Worcestershire sauce
1 large egg, lightly beaten
1/2 cup white bread crumbs
4 white hamburger buns, split
1/2 cup ketchup, to serve
1/4 cup regular mayonnaise
12 cup pickle slices

Directions:

Place 2 tablespoons oil into a large non-stick frying pan over medium-high and heat until hot. Add mushrooms and cook, stirring, for 4 to 5 minutes or until pan juices have evaporated. Remove from heat,drain excess liquid and set aside for 10 minutes. Combine mushrooms, ground beef,onion,salt and pepper,Worcestershire sauce and egg in a large mixing bowl. Mix well using your hands. Form mixture into patties using Burger Mate, place onto a lightly oiled tray,cover with plastic wrap and refrigerate for 20 minutes.Heat a large non-stick frying pan on medium-high heat.Cook patties for 4 to 5 minutes on each side or until cooked to your liking. Grill hamburger buns.Top each bun base with shredded lettuce, sliced tomato and two patties. Drizzle with barbecue sauce to serve.