*One 15-ounce (425 g) can of black beans yields only 1 1/4 cups black beans. So if using canned, be sure to grab two cans! Also, if black beans are unsalted, add 1/4 tsp extra salt to burger mixture.
*For a simple burger sauce mix 2 parts vegan mayo and 1 part ketchup. Add hot sauce or Sriracha for extra heat.
*To freeze for later, cook burgers as instructed on grill or skillet. Then set on a baking sheet or plate and freeze. Once frozen completely, seal in a freezer-safe bag or container and store for up to 3 weeks. Reheat in a 375 degree F oven on a bare baking sheet for 20-30 minutes, or until warmed through and golden brown (or in the microwave for 1-2 minutes).