Burger With Caramelized Onions And Mushrooms: Juicy beef burgers w/ homemade sauce topped with sautéed mushrooms and caramelized onions. Perfect for dinner!
Onions: In a large skillet, add 1 teaspoon of olive oil over medium heat. Toss in the onions and salt and pepper. Cook for 8-10 minutes or until the onions have softened and darkened a bit. Pour in the balsamic vinegar and let it reduce for 1 more minute. Remove from heat
Mushrooms: In a large skillet, heat 1-2 teaspoons of olive oil. Add the mushrooms and toss until they have browned and reduced in size. Add salt and pepper and remove from heat
Burgers: Divide ground beef in 4 balls, flatten them with your hand to form patties
Sprinkle salt and pepper
In a large skillet (or grill) heat over medium-high heat. Cook burgers to your desired doneness. Turn them just once. About 3 minutes on each side
Remove from heat, add the cheese and cover with foil to rest. About 1-2 minutes
For sauce: mix all the ingredients in a bowl. Test for seasoning and make the necessary adjustments
Assembly
Toast the hamburger buns
Place lettuce on top
Place the beef and slab some sauce on top
Add the tomatoes, mushrooms, onions and the top bun