Prep all the ingredients and lay them out.

In a food processor pulse garlic, onion, and rosemary until chopped. Add chickpeas, parsley, and bread crumbs and pulse until just combined.

Transfer mixture to a bowl and stir in walnuts, egg, and salt and pepper, to taste, until well combined. Form mixture into four 3-inch patties. Chill patties, covered, at least 1 hour and up to 1 day.

In a large skillet (cast iron helps form a nice crust, but nonstick works too) heat oil over moderate heat until hot but not smoking. Cook patties until golden brown, about 4 minutes on each side.

Arrange burgers on a foil lined baking sheet and heat in a 350 degree oven for about 5 to 10 minutes or until ready to serve. You can skip this last step if you want, but it makes the burgers a little hotter, plus it gives you time to finish prepping all the other components of the meal.