This recipe calls for white bread, but I like to use 7 grain:
SOUTHERN TOMATO SANDWICH
Combine 1/2 cup mayonnaise, one tablespoon fresh lemon juice, one finely chopped garlic clove, and one teaspoon black pepper. Spread on one side of 4, 1/2 inch thick slices of white bread and top evenly with 4 large sliced heirloom tomatoes. Sprinkle with one teaspoon kosher salt and cover with 4 bread slices. Serves 4.