My mum always made us this:
Some type of pasta boiled, and then drained, and whilst still in the hot pan, she'd add some tomato puree and a few raw eggs. Mix well and the heat from the pan cooks the eggs. Season to taste.
I make it for my DC and they love it.
Also:
something on toast, eg,
baked beans,
spagetti hoops,
fried egg,
scrambled egg and smoked salmon,
tinned fish in sauce.
Omelette or pre-made packets of dried ramen noodles with veg.
Roasted cauliflower.. cut into florets of similar size, place on roasting tray and season with salt pepper, paprika, cumin (or whatever). Spray or drizzle with oil and roast at 180° til golden brown and crispy at the edges. It's so nice, I could just eat a plate of this (and I'm not even vegetarian!)