Things on toast, egg, cheese, beans - easy enough for an 11 year old to do themself if you are having meat.
Humus with pita bread and/or veg to dunk - easy to make with tinned chickpeas.
Easy garlic dip, one clove of garlic finely chopped, 2 tablespoons of mayo and 2 of greek yogurt - mix together.
Easy cheese/creamy sauce. 1/2 tub of philadelphia (or similar) put in a pan with 2 desert spoons of water and stir with a wooden spoon. It works well with pasta on its own but you could add peppercorns, mushrooms, spring onions etc to bulk it out, it also goes well with fried or wedges.
Roasted veg.
Home made spring rolls, buy the wrappers and a supermarket bag of stir fry veg, wrap the veg in the spring roll wrapper and oven bake or fry.
Some ready rolled puff pastry, spread dijon mustard on top and sprinkle with parmesan, use a utter knife to score into 'straws' and bake - when you take it out of the oven smap into straws, have as a snack or something to dip.
Alternatively leave out the cheese and instead of baking whole cut a ribbon, wrap it round a few asparagus spears and bake.
posh fried eggs, separate the white and yolk, whisk something you like in the egg white (I use smoked salmon but that's not veggi) you can use spring onions, cheese, anything that cooks quickly. Pour the egg into a frying pan, make a small hole in the middle and add the yolk back in.
Rice cooked in coconut milk with veg added and spices if you like.