Make this sauce for Shrimp Summer Rolls.
Heat oil in a small saucepan over medium-high heat. Add garlic, tomato paste, and hoisin and cook, stirring, until mixture comes to a boil, about 1 minute. Add 1/4 cup peanut butter and 1 cup water and return to a boil, whisking until mixture is smooth and thoroughly incorporated.
Reduce heat to medium-low and simmer until thickened and slightly darkened, 3 minutes. Remove from heat; whisk in remaining 1/4 cup each peanut butter and water, and let cool. Divide among dipping bowls and garnish with peanuts.