Ingredients
1 cup mayonnaise2 tablespoons Dijon mustard3 teaspoons chopped shallot, divided2 teaspoons minced fresh tarragon or 3/4 teaspoon dried tarragon2 garlic cloves, minced2 loaves (1 pound each) unsliced French bread1 teaspoon salt1/2 teaspoon pepper2 pounds ground beef4 cups spring mix salad greens
Preparation
In a small bowl, combine the mayonnaise, mustard, 1 teaspoon shallot, tarragon and garlic; cover and refrigerate.
Meanwhile, cut bread into six 4-in. lengths (save remaining bread for another use). Cut bread pieces in half horizontally; set aside.
Crumble beef into a large bowl; sprinkle with salt, pepper and remaining shallot. Shape into six patties. Grill burgers, covered, over medium heat for 6-8 minutes on each side or until a thermometer reads 160° and juices run clear.
Grill bread, cut side down, for 1-2 minutes or until toasted. Spread with mayonnaise mixture. Layer bread bottoms with greens and burgers. Replace tops.
