Growing for the taste

Thanks SC.
My aim is to be able to grow these veg all year round so there will always be an onion, cabbage, spinach, lettuce (or their substitute) available to pick every day. If I can do it in January,I should be able to do it for the rest of the year. I need to consider different varieties of each to ensure year round picking.

I haven't work out how to grow substitutes for the fruiting veg - like tomatoes, and climbing beans so I'll have to settle for extending the season as much as  possible,
Peas can be grown over much of the year but I may substitute pea shoots during the winter months.
Beans are more difficult and I'm not going to mention courgettes and other cucurbits!

Have you considered a bush type courgette in a big tub in one of your greenhouse’s? Not necessarily for this time of year, just in general. As they’re not playing nicely for you outside at the moment. Have you not got any dried / frozen beans & tomatoes you could use. Or is it just fresh substitutions you’re looking for?  Maybe make those things a priority pick when you go to your fresh freebies. If you’re aloud to choose. As for home grown substitutions, I’m afraid I’m at a loss.