Get a big sack type planter for your greenhouse or conservatory; fill it with some lovely growing media of your choice (I use good quality multipurpose compost mixed with some delicious homemade compost) and sow yourself some salad crops.
I am currently enjoying small harvests of salad bowl lettuce, lollo rosso lettuce, coriander and beautiful, shiny, red radishes. It is so, so worth the effort if you have the space and the facilities. I mean, look at these stunners…..