Preheat oven to 350 degrees
Add one and a half cups of rolled oats to a high-speed blender. Blend on high until the oats are fully broken down and resemble flour. Then transfer the homemade oat flour to a separate bowl. If you have store-bought oat flour, then you can skip this step.
Once you have removed the oat flour from the blender, add chickpeas, mushrooms, garlic clove, peanut butter, soy sauce and spices.
Blend together until fully combined. The mixture won't be fully smooth, but there shouldn't be any large chunks. Depending on the type of blender/ food processor, you may need to stop and scrape down the sides to help the blender blend.
Pour the chickpea mixture into a separate bowl. Add oat flour and mix using a rubber spatula. If the batter is still tacky to the touch, add 1-2 tablespoons of flour. The mixture is naturally on the wet side, so if it sticks to your hands slightly, that's okay.
Line a baking sheet with parchment paper. To form the patties, lightly spray or oil your hands to prevent the batter from sticking. Then using a spoon, scoop out 2 spoonfuls and roll into a ball. This should make about 6 chickpea patties. To flatten, lightly press them with your hand to about a 1/4 of an inch.
Bake at 350 for 18-20 minutes. The patties will be golden brown and feel firm to the touch. Serve them up with all your favorite burger fixins' and enjoy!