Food & Cooking Recipes Ingredients Egg Recipes Martha's Favorite Egg Salad Sandwich 3.5 (163) Yield: 6 Martha's favorite egg salad sandwich is a healthy—and delicious— lunch choice. Directions Using a pastry blender or fork, mash together egg whites and yolks in a large bowl; carefully fold in avocado. Stir in mayonnaise, mustard, and lemon juice; season with salt and pepper. Place 6 slices of bread on a work surface. Evenly divide egg salad among bread slices. Add lettuce greens or tomato, if desired. Top with remaining 6 slices bread. Serve. Credit: not applicable