Dry Roast the oats and keep aside for cooling.
Measure and add roasted oats (rolled + instant) in a mixer grinder jar and grind it to fine powder texture. (READ NOTES BELOW)
In a bowl, sieve the besan or chickpea flour and add the powdered oats
Add finely chopped onions, coarsely ground mix of ginger and green chillies, seed mix, hing or asafoetida, turmeric powder, red chilli powder and salt to taste.
Now add water and slowly mix it until you achieve a thick pouring consistency batter. Whisk the batter well to avoid lumps.
Heat a pan or griddle, season it with oil and pour a ladle or two of the oats chilla batter. Spread the batter evenly.
Pour oil on all sides and let it cook on medium heat.
Flip and cook the other side as well by pouring oil on all sides.
Serve it hot with a chutney of your choice and tomato ketchup.