Sprinkle the shrimp with the Southwest Seasoning and use your hands to coat thoroughly.
Heat a large heavy dry skillet over high heat. When the skillet is very hot, add the shrimp and sear them for 3 minutes on each side. Remove from the heat.
To serve, spoon 2 tablespoons of the cilantro oil onto each of 4 plates. Arrange 6 shrimp on top and drizzle with another tablespoon of the oil. Sprinkle each serving with 1 tablespoon of the green onions and 1 tablespoon of the red bell peppers.
Yield: 4 first-course servings