I've discovered a great gadget...

[ladyandthechocolate]

this
You can basically convert fruit and veg into noodles of varying sizes. So I've been having courgette noodles with bolognaise and stir fries and they taste ace- you wouldn't miss the noodles or spaghetti. It has also given the kids a new appetite for vegetables and they devoured an entire cucumber made into noodles. So far I have spiralised carrots, cucumber, apples and butternut squash.
You can make lots of different recipes including salads but I've not tried those yet. I found a blog website devoted to 'spiralising'.
These are my courgette 'noodles'.

Cheaper alternatives ?

This sounds like a good idea!
Do you have the veg alone or do you use them to mix with noodles so you're having less of them?

With spag Bol how would you cook the courgette?

And is it easy to use?

Well for lunch I just had a quick stir fry- chicken, garlic, ginger then I added the courgette noodles a couple of minutes before the end to cook them. They don't take long and then I added some sliced spring onions and a bit of soy and sweet chilli sauce. Really yummy.
I think you can probably steam or microwave the noodles or boil them for a moment or two. If you were doing spag Bol you could probably pop them in with the spaghetti for the last minute of cooking if you wanted a mix of the two.

It is very easy- cut courgette in half, place in device and wind handle.

I'm thinking I might have to get one of these when I get paid!