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Mushroom Burger with Aioli

Mushroom Burger with Aioli

Mushroom Burger with Aioli is a juicy, delicious summer treat. This gluten free burger recipe will be on your menu all summer long!

Ingredients

  • 1 1/4 lbs. lean ground beef
  • 1/2 tsp. salt, divided
  • 1/4 tsp. freshly ground black pepper
  • 1/2 tsp. onion powder
  • 1 Tbsp. Worcestershire sauce
  • 2 Tbsp. butter
  • 1 onion, sliced
  • 1 (8 oz.) carton sliced white mushrooms
  • 2 tsp. fresh thyme
  • 1 1/2 Tbsp. stone ground mustard, divided
  • 1/3 cup mayonnaise
  • 1 1/2 Tbsp. horseradish
  • 1 Tbsp. lemon juice
  • 1 tomato, cut into 4 thick slices
  • 2 cups spinach

Instructions

  1. Preheat grill to medium high heat.
  2. Combine beef, salt, pepper, onion powder and Worcestershire. Form into four patties. Set aside.
  3. Heat a large sauté pan to medium-high heat. Add butter and onion and sauté for 5 to 7 minutes, until slightly caramelized. Add in mushrooms and sauté for 5 minutes. Add in thyme and 1/2 tablespoon mustard. Stir to combine.
  4. Grill burgers on each side for 5 minutes or until desired doneness. In a small bowl, add mayonnaise, horseradish, 1 tablespoon stone ground mustard, lemon juice and ¼ teaspoon salt. Stir until combined. Place tomatoes on a plate, then spinach, burger, aioli and mushroom mixture. If desired, serve on a bun.