Take one flour tortilla/taco shell and fill the bottom with 1 cup lettuce. Use 1/4 of macaroni salad and place on top of the lettuce. Add 1/8 cup of tomatoes, 1/8 cup cheddar cheese, 1/8 cup avocado and 1/8 cup black olive slices. Garnish with pickled jalapeño. Repeat with remaining taco shells and ingredients.