Found this tangy garlic mayo recipe while trying to dress up a steak sandwich but it works a much better on BLTs. I'll include ingredients for a single sandwich, you can multiply the ingredients from there depending on how many servings you need.
Tangy Garlic Mayo: Mash minced garlic with a spoon until you get a pasty consistency. Stir garlic, mayo, balsamic vinegar and lemon juice in a bowl until thoroughly mixed.
BLT Club:
Spread garlic mayo on first piece of toast, top with 2 leaves of lettuce, 3 slices of bacon and 2 slices of tomato.
Spread garlic mayo on both sides of second piece of toast and place on top of first layer of sandwich. Top with 2 leaves of lettuce, 3 slices of bacon and 2 slices of tomato, salt and pepper to taste.
Spread garlic mayo on last slice of toast, place on sandwich, then cut diagonally and serve. (fries and a pickle spear are a good side).