Heat a medium sized skillet with olive oil on medium heat.
Saute the onion, garlic and mushrooms until soft and tender (this should take several minutes).
Transfer the onion, garlic and mushrooms into a food processor fitted with an S blade.
Add half the black eyed peas, almond butter, tamarind paste, soy(a) sauce, paprika, thyme, parsley, black pepper and pink salt and ground flaxseeds.
Pulse a few times until an almost smooth with some chunky bits is achieved.
Add the remaining black eyed peas, oats and sweet potato.
Pulse a few times in a stop and start motion until the black eyed peas are slightly broken down, you want them to be slightly chunky with some texture left (remember to scrap down the sides).
Do a taste test of the mixture and adjust if needed.
Scoop some of the mixture (using a ⅓ or ½ measuring cup) and with oiled hands, mould into patties (about ½-3/4" in thickness).
Repeat the above step and lay the patties out on a plate lined with parchment paper.
Refrigerate for up to an hour (this will help to keep the burgers firm).
Preheat an oven at 180C/356F.
Line a baking tray with parchment paper and coat with oil.
Place the patties on the baking tray and bake until the patties brown (this should take 15-20 minutes.