Blue Cheese Burgers from Barefoot Contessa. In a large bowl, carefully mix the meats, steak sauce, egg yolks, salt, and pepper with the tines of a fork, but do. Fabulous grilled blue cheese burgers, with ground beef, mustard, garlic, green onions, and tangy creamy blue cheese. Salty blue cheese, sweet onions, and juicy beef are a classic and addictive combination. Cooking the onions is the most time-consuming part of this recipe, but.