Slice each tomato into 3-4. (Adjust depending on the size of the tomatoes.)
Place the tomato slices on the bread from Step 1, top with pieces of mozzarella and basil, and toast in the oven.
It's done when the cheese has melted.
Story Behind this Recipe
I got the idea for this when I was making "Brandy's" Half and Half Pizza. I wanted to enjoy the taste of pizza Margherita for breakfast and also to use up leftover mozzarella.
Make sure you use cherry tomatoes. They are sweet, and go well with the umami of the cheese and the basil, so you don't need seasonings. If you prefer a saltier taste, mix salt in with the olive oil before you spread it on the bread, or lightly sprinkle right before eating.