NYT Cooking: This vegetarian burger patty is inspired by a love for caramelized cabbage. It isn’t a conventional burger patty made of grains and beans. Instead, cabbage and mushrooms lend a crunchy, slightly meaty texture that is hearty and reminiscent of okonomiyaki, and the patty is held together with chickpea flour. The recipe for the patty is gluten-free and, if you opt for a gluten-free bun (and your s...