I was going to suggest beans on toast (beans in the microwave) or shortbread, but you mean propper cooking.
Put sweet potatoes in the microwave for 4 mins, turn and cook for another 4 mins.
Cool a bit and the sp can be squeezed out and it looks like mashed with no peeling. Not a meal on its own but easy accompaniment.
Pancakes - if you use two pans, cook the pancake in a small pan and then turn it over on to a big pan to cook the other side maybe he could do them.
If not you can make a batch and then let him fill them with cheese / onions / cooked bacon then warm in the oven.
Pizza
Slow cooker stuff, sausage caserole / stew / roast.
And can I borrow him when he is 8 and got his first michelin star?