Pour Balsamic vinegar in a ceramic coffee cup place in the microwave and cover with napkin. Cook on high 1 min. then continue cooking for 30 second intervals until thickened enough to coat the back of a spoon.
While that is heating use your slotted spoon to dip heirloom tomato's one at a time into the simmering water for 5 seconds. Remove and Cool tomato's immediately under cold running water. Skin will be loose and will easily peel off by hand.
Peel and slice tomato's into 1/2 inch slices.
Drain buffalo mozzarella and slice into 1/4 to 1/2 inch slices.
Fan sliced tomato's and alternate each slice with a slice of mozzarella.
Rinse, pluck from stem, and stack 6 - 8 basil leaves. Roll tightly into a cigarette shape and thinly slice the cross grain to chiffonade the basil.
Sprinkle top of heirloom tomato and mozzarella fans with Basil, (ground) Sea Salt & Pepper and a fine drizzle of balsamic syrup.