Cook the gnocchi according to the package directions. Reserve 1/2 cup of the cooking liquid, drain the gnocchi, and return them to the pot. Add the butter, mustard, the reserved cooking water, 1/2 teaspoon salt, and 1/4 teaspoon pepper and toss until the butter has melted. Fold in the parsley and chives.
Find recipes with ingredients that you have on hand.