Drain, rinse, and pat-dry chickpeas with paper towel.
Mash the beans, rice, oats, bread crumbs, and nutritional yeast together in a large bowl.
Finely chop/grate and mix veggies together.
Combine the wet sauces, chia eggs, and spices.
Lightly saute veggies in olive oil for about 5 minutes and add to bean mix.
Add in the wet ingredients and spices.
Taste test for desired result. Adjustments can be made using flour or other dry ingredients if it’s too wet, or filtered water if too dry.
Form into patties using a mold or by hand, and cool in fridge for at least an hour on baking sheet lined with parchment paper.
Bake for 20-30 minutes until crust forms, then flip and bake another 10-15 minutes or until done. For cheeseburgers add sliced vegan cheese in the last 10 minutes.
You can fry or barbecue by cooking on high then medium heat for about eight minutes on each side. Top with cheese near the end for vegan cheeseburgers.