Slice tomatoes into thick slices (if using smaller tomatoes, just slice in half). Place on metal pan and sprinkle with kosher salt. Place under broiler for 3-5 minutes or in 500 degree oven for 5-7 minutes. Remove from oven and top with slices of mozzarella and basil. Return to oven for 2-4 more minutes, or until cheese is fully melted. Serve warm.
*For tomatoes- If using Roma, slice in half down the center. If using Garden tomatoes, slice in thick 1/2 -3/4 inch slices.
Serving Size: This will serve as many as you allow tomatoes for. I usually allow two slices per person. This is one of those recipes that you can just adjust the quantities based on how many you want to make, which is why it makes a perfect lunch for one!