Harvesting enough vegetables to actually be saving some money

I've been growing enough salad that I've only been having to supplement with tomatoes, houmous and toast for some weeks now, which I reckon is a good couple of quid a week, but just recently I've got to the point of harvesting onions, peas and courgettes too. The onions are still a bit on the small side, but other than that they're fine, I harvested a yellow one and a white one (which is surely at least 60 pence worth):

The problem with the onions is that several of them decided to flower instead of producing a decent sized onion (it's one or the other with onions, no having your cake and eating it):

Onion flower

Onion flower

I've also harvested a rather oversized courgette,

which I used in a warm, lemony courgette salad fir lunch, a recipe adapted from this one, due to me not having all the ingredients:

Ingredients (for my version):

2 normal-sized/1 huge courgette(s)
1 tbsp olive oil squeeze of lemon juice
1 garlic clove, crushed
some basil leaves,
roughly torn

Method:
1. Use a vegetable peeler to slice the courgette(s) into wide strips, discarding the central, seedy part. 
2. Heat the oil in a large frying pan, add the garlic, and fry over a medium heat for 1 minute.
 3. Add the courgette strips and cook, stirring regularly, for a further 1-2 minutes until the courgettes are slightly softened.
 4. Add a squeeze of lemon juice and toss the basil through.

It was quite alright and really not a bad way to eat courgette. I think lemon zest (like the original has) would probably have been an improvement, but I only had lemon juice in a bottle and no actual lemons.

I've also been harvesting peas. You need a heck of a lot to get a meal's worth. Here's a picture of the amounts of peas I got from a recent harvest on the left (just about two portions) and the pods I shelled them out of on the right. It was practically every pea on all my pea plants (both sorts) that was already large enough for me to harvest. I don't get how they can sell frozen peas for so little money. They must definitely be able to shell them mechanically, otherwise even frozen peas would surely cost a fortune, as I reckon shelling them took me at least ten minutes. Based on the price of frozen peas, I'm thinking that's probably only 40 pence I've saved myself there, although luckily I had some of the peas back when they were still mangetout, and they sell for more, so that's probably about £1.40, which is heading towards me having nearly made half the price of the seeds back!

The two sorts of peas looked more different than I expected when cooked. I think the paler ones are probably the Carouby de Maussane (mangetout) peas, as they're the ones with the paler pods.