french onion burgers

"I get bored with just the plain burgers. I found this recipe in Taste of Home and had marked it to save. It is a simple yet tasty sounding burger."

In a bowl, combine the onions, Worcestershire sauce, salt and mushrooms if using. Crumble beef over mixture and mix well. Shape into 4 patties.
Grill, uncovered, over medium heat or broil 4 inches from the heat for 6-9 minutes on each side or until no longer pink. Serve on buns with any condiments and toppings of your choice.