Preparation In a bowl combine black-eyed peas with water to cover and let stand overnight. Drain peas and in a 4-quart saucepan, combine with water to cover by 2 inches. Add bacon fat and onion. Simmer mixture, covered, 30 to 40 minutes, or until peas are tender, and drain well, discarding onion. In a bowl, combine all ingredients with salt and pepper to taste and toss well. Chill mixture, covered, for at least 5 hours and up to 2 days. Serve black-eyed peas chilled or at room temperature.