Mushroom Swiss Burgers

Start by pulsing the dried shiitake mushroom in a food processor until it turns into a powder.
Add the ground beef into a bowl along with the mushroom powder, garlic powder, onion powder, 1 tablespoon of Worcestershire sauce, and salt and pepper to taste. With your hands, mix until everything is combined.
Form the patties, they should be about 5-6 patties!
Make the mushroom and onion toppings. In a saucepan on medium high heat, add the butter and 2 tablespoons of Worcestershire sauce. When the butter melts, add the onion and stirring for about 3 minutes. Add the fresh mushrooms and sauté for about 6 minutes, stirring occasionally. Turn heat to low and keep sautéing for 10 more minutes.
Grill the burgers for about 5-8 minutes per side. You should cut the thickest patty and check the inside to see if you need to cook for longer.
When the burgers are almost done, add the cheese and allow to melt.
Optional: grill the buns for 30 seconds to 1 minute on each side before serving!
Assemble the burgers and top with the sautéed mushroom and onions!