If you want to add corn to the stacks, preheat a grill to medium heat. Rub olive oil on the corn and place corn directly on the grill and cook until slightly charred. Turn the corn to achieve grill marks all around the corn. Remove from the grill and cut the kernels off the cob. Set aside.

Cut the avocado crosswise around the “equator” (the middle) and twist both halves to separate them. Tap the pit with the blade of a large knife and twist to remove. Carefully remove pit from blade. Take a large serving spoon and scoop the flesh of the avocado out from the shell. Slice avocado crosswise into thick rounds.

Arrange 6 slices of tomato on a platter. Top each piece of tomato with a little sprinkle of salt and then a round of avocado. Repeat with tomato, salt, avocado and end with tomato. Or arrange overlapping across a platter.

Drizzle stacks with ranch dressing to taste. Sprinkle corn kernels on top.