Veggie pasta bake: homemade tomato sauce packed with any combination of peppers, carrots, sweetcorn, courgettes, frozen soya beans, tinned cannellini beans... Stir plenty of it into pasta. Top with egg-enriched bechamel sauce, then a mixture of grated cheddar and breadcrumbs. (I am yet to meet any normal human being who doesn't love this.)
Lentil Dahl with rice or chapatti and a sliced, hardboiled egg.
Macaroni cheese with tomato salad
Baked potatoes with veggie chilli (see monkey's recipe), or with hummous and roasted veg (any mixture of red onions, courgettes, peppers, carrots, parsnips, butternut squash, fennel...). If you like it spicy, keep a jar of Harissa in the fridge to liven it up. Obviously, baked potatoes with beans and cheese are also brilliant.
Omelette with peas and chunks of boiled potato, served with a green salad and crusty bread.
Veggie casserole with cheesy dumplings.