Good job I didn't enter in the end because I was going for a breakfast idea. Although I would've taken it to the extreme with another few layers consisting of hash browns, mushrooms and grilled tomatoes.
The lack of mushrooms was a tactical choice. I know a lot of tef people are a bit fussy and I didn't want to lose votes. Too many more layers and it would stop being edible as a sandwich, to be honest I'm not that bothered about hash browns, if you went with that I think it'd have to replace the fried bread or need another egg for it to soak up. Grilled tomato has no place in that sandwich.
I did think about trying to create some sort of baked bean parcel to go in the middle, but it seemed like too much work. that might be a project for another time.