Try again. And keep on trying. Eventually something will grow.
One of my favourite winter side dishes is cauli and broccoli baked in cheese sauce. Preferably served alongside roast beef.
Much more economical for a single (or two) person household.
I have mini cauliflowers too, they're about the same size as this tiny cabbage.
Once this lot is harvested and shared around with my family, the tubs will be dug over, have compost and a little manure added, then they'll sit idle for a couple of months before planting again with summer produce.
I'm thinking of trying cucumbers.......