Savoy Cabbage, Kohlrabi and Grapefruit Salad
500g head of Savoy cabbage, finely shredded (4 packed cups)Kosher salt1 red grapefruit1/4 cup olive oil2 tablespoons fresh lemon juiceFreshly ground pepper500g kohlrabi, peeled and coarsely grated2 tablespoons finely shredded mint leaves, plus whole leaves for garnishIn a large glass...