1
Wash and dry produce.
Trim and thinly slice scallions, separating whites from greens; finely chop greens. Halve, peel, and dice half the onion (whole onion for 4 servings) into ½-inch pieces.
In a small bowl, combine scallion greens, two packets of sour cream, and 1 tsp vinegar (four packets of sour cream and 2 tsp vinegar for 4). Stir until smooth. Season with salt and pepper.