Preheat the oven to 350°. Cut off the top of the tomato and scoop out the insides with a spoon. A graperfruit spoon or knife is handy here, but it can be done just as well with a regular spoon.
Place the tomatoes on a foil lined, rimmed baking sheet.
Crack an egg into the hollow of the tomato. Bake at 350° for 30 minutes.
Add your desired toppings.