Based on my experience you have to accept the vagaries of the season, roll up your sleeves and try again next year if something doesn’t work - last year, I could not give away cucumbers fast enough; radishes were really good (for the first time ever), but salad leaves only survived in pots and troughs kept on a table away from slugs and snails. Said molluscs sheared everything else to the ground - courgettes, butternut squashes, dwarf and climbing beans, spring onions, coriander, purple sprouting broccoli, even Jerusalem artichokes! I got one small, sad tomato from a relatively expensive grafted beef-steak variety.
This year, I have coriander everywhere, salad leaves have been brilliant apart from a bit in August because it was too hot for them to germinate in July. The only exception has been Rocket which has sulked or simply refused to germinate! Definitely spent less than buying lettuce. Packets of mixed mustard leaves are also really good for spicing up a salad.
I have had so many beef-steak tomatoes this year (from seed) that I have four litres of pasata in the freezer, and DH has had tomatoes in some form almost everyday until recently. And unlike some of the more common varieties these are harder to find and more expensive in the shops.
French beans both climbing and dwarf have been great - excellent both as an accompaniment or bean curry! And are now being stored in the freezer. Before they were ready we had lots of mange tout, and because they were from the garden, could pick them really small and use them in salads.
Cucumbers have been adequate but not exceptional like last year. BUT once you taste home grown you will never look at shop bought, out of season, air mile heavy ones again.
I also bought a red current and a white current bush for about £5 each last year. The birds tend to get the RC before I can because I don't have a fruit cage, but the white currents escaped, only enough for two servings, but worth it!
My garden is small, and mostly still flowers and shrubs. I make my own compost and comfrey feed, and scavenge and repurpose whenever I can (though I'm not quite in Bob Flowerdew old fridge and tyre territory!).