Method. In a large nonstick skillet with a tight-fitting lid, heat 2 teaspoons of the olive oil over medium high. Add the shrimp, then sprinkle with 1/2 teaspoon salt and 1/4 teaspoon chili powder. Sauté just until the shrimp are pink and cooked through, about 3 minutes. Immediately remove the shrimp to a plate so they do not overcook. Heat the remaining 2 teaspoons olive oil in the same skillet, then add the onion. Let cook until the onion begins to soften, about 5 minutes. Add the garlic and cook just until fragrant, about 30 seconds.