What are the best practices for scaling up Indian dishes such as chicken curry, butter chicken, palak paneer, etc. that follow these generic steps (albeit with different ingredients):
oil -> whole spices -> onions -> ginger garlic -> tomatoes -> chicken/veg
The process above yields extremely tasty & authentic dishes that serve 4-6 people and I have used various recipes with good success.
But when I double/triple/quadruple the quantity (i.e., the amount of chicken or spinach) things go awry. I increase the base curry ingredients (onions, ginger/garlic/tomatoes/spices) but not necessarily twofold, threefold, or fourfold, etc. The result is a dish that lacks flavor or balance.
The question is, should all ingredients proportionally increase?