Temper the nut paste by gradually adding warm curry sauce to it before incorporating it into the main dish. This prevents shock and separation.
Nut pastes, like cashew or almond butter, are essentially emulsions of nut solids and oils. When added directly to a hot curry, the sudden temperature change can cause the emulsion to break, leading to oil separation and a grainy texture. Tempering helps to stabilize the nut paste and prevent this. Here's a step-by-step guide:
Prepare the Nut Paste: Ensure your nut paste is at room temperature. If it's been refrigerated, allow it to warm up slightly.
Warm the Curry Sauce: Take a few tablespoons of the hot curry sauce from the main pot and place it in a separate bowl.
Temper the Paste: Gradually add the warm curry sauce to the nut paste, one spoonful at a time, mixing thoroughly after each addition. This slowly raises the temperature of the nut paste without shocking it.
Incorporate into the Curry: Once the nut paste is fully incorporated with the warm curry sauce and has a smooth, even consistency, gently stir it into the main pot of curry.
Simmer Gently: After adding the tempered nut paste, simmer the curry on low heat for a few minutes to allow the flavors to meld. Avoid boiling vigorously, as this can still cause separation.
Use a high-quality, smooth nut paste without added stabilizers or sugars. These additives can sometimes interfere with the emulsification process and increase the likelihood of separation. Also, blending the nut paste with a little water or milk before tempering can further help to create a smoother, more stable emulsion.