Pakistani Pakora

Name: Pakistani Pakora
Prep time: 5 min
Cook time: 15 min
Total time: 20 min
Cuisine: Asian, Indian
Ingredients: 1 small ~90g onion ((thinly sliced)); 1 small potato (~100g depending on potato type) ((cut twice in half lengthwise and sliced)); green chilli ((if large and spicy, only need 1), chopped); green coriander (handful of leaves, chopped); 1 tsp cumin ((zeera)); 1 tsp crushed red chili; 1/2 tbsp (heaped) whole coriander seeds (roughly crushed); 1/2 tsp khatai powder ((amchur)); less than 1/8 tsp baking soda; 1 tsp corn flour ((cornstarch)); 1 1/8 or 1 1/4 tsp salt ((I prefer 1 1/8 tsp)); 1 cup gram flour ((besan)); 3/4 cup water; oil ((as needed for deep frying))