How to Make It
In a small skillet, melt 3 tablespoons of the butter. Add the onion and cook over moderate heat until softened, 3 minutes. Whisk in the crushed red pepper and shrimp paste and cook, stirring, until fragrant, 2 minutes. Whisk in the lime juice and the remaining 3 tablespoons of butter and season with salt. Keep the shrimp butter warm.
Light a grill or preheat a grill pan. Season the shrimp with Salt Black pepper and thread onto the skewers (don’t pack them on too tightly). Grill over high heat, turning once, until lightly charred and just cooked through, about 4 minutes total. Transfer to a platter and spoon the shrimp butter on top. Garnish with mint leaves and sprouts and serve.