By now, we’re all aware of San Francisco’s preoccupation with farm-to-table ingredients. Whether you participate actively in this culture or not, your dining experience and the foods you enjoy change with the changing seasons. In this last bit of winter, hearty vegetables such as beets, Brussels sprouts, Swiss chard, and kale are in abundance, sold at farmers markets and prepared at local restaurants. For me particularly, kale salad has been in constant rotation in my kitchen. Massage it with a little olive oil, salt, and lemon, and you’ve got a delicious and healthy snack. Or, as some chefs are doing, enrich it with cheese, meat, and nuts. So, sick of my own preparations, I decided to take to the streets and find my favorite variations of kale salad.