Adaptations: Feel free to substitute squash, sweet potato, or carrots for beets. If adding greens or zucchini, cook with onions. Substitute spices to be Italian or Mediterranean seasoning if preferred and use white beans or garbanzo beans. If your budget allows, consider topping with whipped feta and yogurt mixed together, fresh tomato/onion/lettuce, or other preferred toppings.
Freezing Burgers: Burgers can be frozen raw or cooked. Wrap each burger individually in plastic or between sheets of parchment paper, and freeze. Raw burgers are best if thawed in the fridge overnight before cooking. Cooked burgers can be reheated in the oven, a toaster oven, or the microwave.
Recipe adapted by Kim Werst eatclosertohome.com from thekitchn.com