Preheat oven to 375 degrees.
Wash skins and remove the ends from one large, or two small beets. Cut in half or fourths to speed bake time. Roast at 375 degrees for about 30 minutes, or until soft. [EASY BUTTON] Purchase cooked beets from the produce department at the grocery. Canned beets work too—just drain any liquid.
If making your own bread crumbs, and/or substituting rolled oats for walnuts, throw bread (and/or oats) into the blender and grind into a fine powder. Keep in the blender.
Add beats, walnuts (substitute oat flour), flax seed, garlic and miso (substitute soy/coconut aminos) to the bread crumbs. Puree until smooth. (If using fresh turmeric, add to this step so that it is thoroughly processed).
Add the remaining ingredients (onion, rice or quinoa, beans, mushroom and seasonings). Briefly blend on low-medium until only small chunks remain. Use the pulse setting to create desired texture. It is absolutely okay to blend until pureed. But if you like chunks, take it slow.
Line a baking sheet with parchment paper. Use a spatula or hands to arrange batter into patties. Bake for 30 minutes. Flip about halfway through to ensure even cooking. Optional: spray with avocado oil or brush with olive oil for the final 15 minutes.
Serve hot with or without a bun and your favorite condiments. I topped mine with sauerkraut, mustard, tomato and cilantro, and served crispy Brussels sprouts on the side.
Store extras in the refrigerator or in the freezer. Make sure they are thoroughly cooled before freezing to avoid freezer burn.