Make the Dressing: Whisk together mayonnaise, sour cream, buttermilk, lemon juice, black pepper, and salt in a mixing bowl. Stir in 2 tbsp. chives and adjust the seasoning to your liking.
Assemble the Salad: Quarter the Little Gems and place on a platter. Spoon the dressing over each wedge and sprinkle with pomegranate seeds and minced chives.