Slice the bagel and remove the a bit of the center with a paring knife, making space for the egg. Brush some butter over both the insides.
On a lined baking sheet, arrange a teaspoon of shredded cheese and place the bagel half over it.
Crack an egg into the bagel hole.
Add cherry tomato halves, season with your favorite seasoning and top with more cheese. Bake for 13-15 minutes.
Notes
Don't let go of the bagel scraps you have leftover after removing the middle. Brush them with some butter and bake them alongside the bagels!
To keep a nice balance between the egg and bread, I used one sliced half of a bagel with one egg. If you prefer a heartier version, you can use a whole bagel too.
The eggs can go from runny to overcooked pretty quick. Keep an eye on them at the 12-13 minute mark and remove them whenever they look set, or depending on your personal preference.
You can also bulk up the bagel with other toppings and mix-ins of your choice. I love chopping up some leftover veggies that I have (zucchini, mushrooms, bell peppers and onions are great) and adding them in too.