Get all your ingredients together. Good, let's get cooking!
Combine chickpea flour, potato starch, baking powder, and Cajun seasoning (paprika, Asafoetida Powder, oregano, cayenne pepper, salt, pepper). Or add your favorite seasonings.
Mix coconut milk and lemon juice. This will serve as the “buttermilk” replacement.
Coat oyster mushrooms in the liquid mixture. Dip in flour and spice mixture and make sure all grooves are properly covered. Lay them out on a large sheet pan and let sit for 10 minutes. Continue until all oyster mushrooms are properly coated with flour and spice mixture.
Heat a deep frying pan on medium with a coat with oil ¼ inch deep. Wait till oil is sizzling (test with flour mixture if needed). Start to place coated oysters mushrooms in a pan (do not overcrowd). Cook for 2-3 minutes on each side until the crust is golden brown. Be careful not to burn.
Transfer to a sheet pan lined with a paper towel (to absorb the oil). Let sit for 5 minutes.
Garnish with fresh parsley and more Cajun seasoning.