Using paper towels, blot peas dry. Heat oil in a large skillet over medium heat. Add peas and stir to coat. Cook, stirring or shaking the skillet occasionally, until peas are browned and very crisp, about 15 minutes.
Sprinkle with chili powder and salt and continue cooking until fragrant, about 2 minutes more. Sprinkle with citrus zest. Taste and adjust seasoning. Serve warm or at room temperature.