Drizzle 1 tablespoon olive oil on a rimmed baking sheet. Arrange cauliflower on baking sheet, and stir to coat in the olive oil. Roast for 15 minutes.
Meanwhile, mix together the sauce. In a small bowl, whisk together peanut butter, sambal oelek, soy sauce, lemon juice, remaining 1 tablespoon olive oil, and brown rice vinegar.
Drizzle sauce over cauliflower. Add golden raisins, and stir to evenly coat.
Return cauliflower to oven and roast for another 10 minutes, stirring halfway through.