Easy cook-ahead Breakfast Club suggestions please?

[Witchazel]

I am setting up a Breakfast Club at DS's school and need suggestions for some easy, not to expensive, cook-ahead 'specials''. I am offering a selection of cereals, drinks, toast and spreads already. I also want to offer a daily 'special' maybe sort of along the lines of a cooked breakfast but quick to produce on the morning. I don't mind baking / assembling the afternoon or evening before. School kitchen is small and equipment very limited (hence not doing a proper fry-up) also time is limited.

Here's what I was thinking of:

Bacon & cheese / Tomato & Cheese in puff pastry
Muffins - variety of flavours
Slice of ham put in greased bun tin with egg cracked inside, cooked in oven that morning for 15/20 mins
Breakfast bars / flapjack
Apple, raisin & cinnamon in puff pastry

Any other ideas?
Ta x

Tortilla, or going on from that Spanish omelette, but use about 4 or 5 eggs so that it's cut into wedges rather than folded.

Marking place.

I volunteered at a breakfast club in central London last year. All the children were given was toasted bagels and a glass of juice or milk. I am AMAZED by this thread!!!