Maybe you can try to make egg muffin? Just put whatever ingredients you like such as bacon, cherry tomatoes, cheese, sausage, etc and bake in the oven for 20 minutes or so.

Or you can just make a simple yet fulfilling egg sandwich with hard boiled eggs!

Why do you want to put the bread and bacon in the oven? If you want to do it in the oven, maybe you can just put the bacon only? Then if you really want to bake the bread together with the bacon, maybe you can pre-bake the bacon first then put both in the oven. Can also spread butter on the bread first or make this egg-in-a-hole kinda thing. Remember to oil your pan first.

On a personal note, I think it's easier if cook it in a cooking pan. Less hassle

Yes, you need a muffin mold of course. Haha. But you know, you can use whatever mold you have, egg muffin is just a fancy word. Be creative!

Sourdough is like a to-go bread nowadays.