n a small jar, combine all of your vinaigrette ingredients.
Shake well until all the ingredients are well incorporated; set aside.
Slice your tomatoes into 1/4-inch slices.
Thinly slice the onion into rings and finely chop your mint leaves.
Lay a few tomato slices onto a platter. Add some onion rings on top then continue with layers of tomatoes alternating with onions as shown.
Drizzle your dressing over the top.
Sprinkle with mint leaves and serve immediately.