These flavorful, hearty burgers may be a bit crumbly; if you prefer, add a binder such as an egg or soaked ground flaxseed. They’re terrific on focaccia with tomato and red onion. To make 1½ cups cooked lentils, combine ¾ cup dried lentils with 1½ cups water; bring to a boil, reduce heat, and simmer 20–30 minutes. Use your food processor or blender to finely chop nuts, but don’t overprocess or you’ll end up with nut butter.
(Prep time includes 1 hour chill time.)