Clean and devein shrimp. In a heavy skillet, heat olive oil on high. Add green onions and cook until softened. Add shrimp and cook until they turn pink and curl (about 3-5 minutes). Add Dijon mustard and several grinds of white pepper. Remove the shrimp. Add white wine to skillet. Raise heat and stir rapidly, scraping pan. Pour sauce over shrimp. Serve over white rice. Serves 4.