Warm Fingerling Potato Salad

Ingredients (8)

• ✓ 2 pounds fingerling potatoes, cut into large chunks
• + 1 (8 ounce) container lowfat plain yogurt add to pantry
• ✓ ¼ cup sour cream
• + 1 lemon, zested and juiced add to pantry
• + 1 tablespoon coarse-grained mustard, or more to taste add to pantry
• + salt and ground black pepper to taste add to pantry
• ✓ salt and ground black pepper to taste
• + 2 cups torn arugula leaves add to pantry