An omelette with whatever you have in the fridge on it..I like just plain cheese.

I just made a Lentil pie with chopped tinned tomatoes, tinned lentils, celery, onion, grated carrott and some flavouring like worster sauce or stock powder. I used short crust pastry as that is what I had in the freezer, you could easily make it a Lentil Shepherds pie by topping it with mashed potato and bake it for 40mins-1hr so.

Spag Bol...mince, onioin, garlic, tinned tomatoes or tomato soup (kids may prefer the flavour of the soup), grated carrot.

Tuna casserole, layer of large tinned tuna, layer of fresh sliced tomato, layer of sliced onion (could leave out if you like), top it with a very generous layer of mashed potato then grate cheese on that. In oven for 30mins or so.

An easy meal is just something like spaghetti or baked beans on toast..I like this when I just can't be bothered.