Preheat the oven to 375 degrees Fahrenheit and line a baking sheet with parchment paper

In a small bowl, whisk the flax and water together and set aside

In a food processor, grind the walnuts into crumbs then place them in a large bowl

Add the tofu and chickpeas to the food processor and pulse until crumbly

Mix the tofu and chickpeas with the walnuts

Add the diced red onions, beet, BBQ sauce, Dijon mustard, soy sauce, Worcestershire sauce, hot sauce, cumin, paprika, salt, and black pepper to the food processor and blend until smooth

Pour the beet mixture, garlic, and flax egg mixture into the large bowl and stir to combine

Use a ½ cup measuring cup to scoop each burger and add to the prepared pan, using the flat side of the cup to flatten the burgers

Bake for 30 minutes or until crispy on the edges

Carefully move the warm patty to the bottom of a hamburger bun then add your favorite toppings and serve warm