Given the task definition and input, reply with output. In this task, you have to identify the named entities (NER) which are the ingredients required given its directions. Named entities are the names of the items without their quantity.

Cover the potatoes with cold water by 2 inches in a medium saucepan., Bring to a boil; add 3 tablespoons salt., Reduce heat to medium-high; simmer the potatoes until tender, about 8 minutes., Transfer to paper towels to drain., Bring another medium saucepan of water to a boil; add 2 tablespoons salt., Blanch the snap peas until just tender, 1 to 2 minutes., Let cool in an ice-water bath., Drain, and pat dry., Toss the potatoes, snap peas, onion, and vinaigrette in a bowl., Season with salt and pepper., Garnish with the split snap peas, tarragon, and tarragon flowers, if desired., Stir together vinegar and mustard; season with salt and pepper., Pour in olive oil in a slow, steady stream, whisking until emulsified., Stir in sour cream and tarragon.
fingerling, salt, sugar snap peas, red onion, Tarragon Vinaigrette, Freshly ground pepper, tarragon, tarragon vinegar, salt, extra-virgin olive oil, sour cream, tarragon