Name: Burgers with Sautéed Mushrooms, Arugula and Dijon Aioli
Total time: 45 min
Yield: 4 burgers
Ingredients: 1 pound of lean ground beef, (feel free to use fattier beef if you prefer); 1 1/2 tablespoon olive oil; 1 teaspoon salt; 1 teaspoon pepper; 2 tablespoons of unsalted butter; 12 ounces of sliced baby bella mushrooms; 4 ounces fontina cheese, (sliced); 4 ounces sharp cheddar cheese, (sliced); 2 cups of fresh arugula; 1/2 lemon, (juiced); 4 whole wheat buns, (toasted); mustard aioli; 1 1/2 tablespoons dijon mustard; 1 large egg yolk; 2 teaspoons fresh lemon juice; 1/2 cup olive oil; 2 tablespoons whole grain mustard; 1 tablespoon horseradish; a pinch of salt + pepper