When Grace Parisi makes this sauce for her kids, she adds less curry paste; when she makes it for her husband and herself, she adds more. A bit of sauce brushed onto chicken and mango helps them caramelize on the grill.
In a medium saucepan, heat the peanut oil. Add the shallot and garlic and cook over moderate heat, stirring, until softened, about 2 minutes. Add the curry paste and whisk for 1 minute. Add the brown sugar and cook until melted. Whisk in the peanut butter, then slowly whisk in the coconut milk. Simmer for 2 minutes. Remove from the heat and whisk in the lime juice and fish sauce. Serve warm or at room temperature.
The sauce can be refrigerated for up to 1 week.
Best Uses Serve the peanut sauce with grilled beef, chicken, spareribs, shrimp or pork or with crudites for dipping, or mix it into rice noodles or stir-fries.