Slice tomatoes into thick slices (if using smaller tomatoes, just slice in half). Place on a metal baking sheet or cookie sheet and sprinkle with kosher salt. Broil for 3-5 minutes or bake in a 500℉ oven for 5-7 minutes.
Tomatoes, Kosher salt
Remove from the oven and top with slices of mozzarella and basil. Return to the oven for 2-4 more minutes, or until the cheese is fully melted. Serve warm.
Fresh mozzarella, Fresh basil
Notes
*This will serve as many as you want, depending on how many tomatoes you want to use. I usually allow two slices per person.**If using Roma tomatoes, slice in half down the center. If using garden tomatoes, slice into thick 1/2 to 3/4-inch slices.