Hi Jiffy - I am no great cook and I also only cook for myself. What I tend to do is make a batch of something and then freeze it in 4 or 5 portions. My favourite dishes are vegetable paella, vegetable and bean chilli, lentil bolognese and soya mince bolognese (using vegemince from Tesco). That way you don't have to be cooking every night. You never know, you might even get your son to eat one of those
For example the recipe I use for lentil bolognese is so easy and quick and tasty (I can't remember which cookbook it came from though?):
1 onion, chopped
2 cloves garlic, crushed
2 carrots, coarsely grated
2 sticks of celery, chopped
4 oz red lentils (uncooked)
400 g (1 tin) chopped tomatoes
2 tbs tomato puree
3/4 pint of vegetable stock
A good pinch of ground black pepper
In a large frying pan gently cook the onion, garlic, carrots and celery in a little water for about 5 mins, until soft.
Add the lentils, tomatoes, tomato puree, stock and black pepper.
Bring the mixture to a boil then partially cover with a lid and simmer for 20 minutes until thick and soft.
Serve on pasta