Warm 40.5 g peanut oil in a wok or deep, heavy-bottomed pan set over medium heat.
Add 1000 g onion and fry for 5 to 7 minutes, stirring frequently, until rich brown in colour.
Transfer the browned onions onto paper towels to drain off excess fat and let them cool completely.
Put the cooled onions into a blender with 101 g plain yogurt and blitz until a smooth, uniform paste forms. Store in an airtight container in the fridge for up to 3 days.
Use 80% of the weight, finely shredded and browned slowly with a pinch of asafoetida. Replicates the bulk and natural sweetness in gravies without allium.