I am growing three types of Winter greenery; Curly Kale, Perpetual Spinach, and Cavolo Nero. I also have some Purple Sprouting Broccoli, but that's more for next Spring.
The Kale has to be a favourite. Like Cavolo Nero (also a Kale), one simply picks the lower leaves, and works upwards as desired. With luck they should still be producing well into Spring, when they also begin to make sproutings from the stem. They are a wonderful Veg'.
My plants are remarkably bug, and disease, free this year. I simply inspect the back of each leaf, strip the curly leafy bit from the stem, and steam very quickly in salted water. A bit of Garlic Butter completes the job.
Kale also complies with my insistence of 'Meat and one Veg'. A small chop or steak with a serving of Kale, and that's all one needs.
Thank gawd I eats me greens; just eating this stuff makes me feel rejuvenated!