Choose the closest curry-base substitute from the list, aiming for mildness and a creamy end result.
Swap using the ratio target, then simmer with your korma liquid (coconut milk or yogurt-based sauce) to round out harsh edges.
If the substitute is thicker, thin it with stock or water; if it’s spicier, reduce it and add creaminess (yogurt or coconut) to mellow.
Taste at the halfway mark and rebalance: add salt for flat flavor, a pinch of sugar for tomato/red curry sharpness, or extra nutty richness if needed.