You can, probably not much fun though. Assuming from the OP you have curry powder, rice, pasta and frozen peas already.
Shopping list: bread x2 (0.90), jam (0.33), white potatoes (£1.35), baked beans (0.25), bag of cooking peppers (1.15), carrots (0.47), onions (0.75), tinned tomatoes x3 (0.93), kidney beans (0.30), value grated cheese (2.50), 15 eggs (1.25), red lentils (£1.15), sweetcorn (0.35), chickpeas (0.55), frozen vegetarian mince (£1.75), 8 pints milk (2.18) = £16.16.
All prices from Tesco. If you go in person they have fruit for children to eat as they go round.
Monday: toast & jam / jacket potato & beans / pasta with tomato sauce*
Tuesday: toast & jam / cheese omelette / rice with kidney beans and diced pepper
Wednesday: toast & jam / jacket potato & cheese / red lentil and carrot curry & rice
Thursday: toast & jam / fried potato and egg / red lentil and carrot curry & rice
Friday: toast & jam / mashed potato, cheese & onion rissoles / nearly ratouille* and pasta
Saturday: toast & jam / pasta with 1/2 tin of sweetcorn and 1/2 tin mashed drained chickpeas (makes a tuna like consistency, can add mayo if you have any) / veggie mince bolognaise using half the mince
Sunday: toast & egg / pasta with sweetcorn & chickpeas / "keema peas"* and rice
- Fry a diced onion, garlic, carrot, pepper, whiz up with a tin of tomatoes
** Sliced onion, peppers and tin of tomatoes
* Onion, curry powder, veggie mince, add a bit of water to stop it sticking, add frozen peas at end