MUSSELS AND FRIES WITH MUSTARD MAYONNAISE

Mussels and Fries with Mustard Mayonnaise image

Provided by Lillian Chou

Yield Makes 2 servings

Number Of Ingredients 13

1 (15- to 16-ounce) package frozen french fries
1 small onion
2 garlic cloves, forced through a press
3 tablespoons unsalted butter
2 teaspoons dry mustard
2 teaspoons water
1/2 cup mayonnaise
1 cup dry white wine
2 pounds cultivated mussels, rinsed
2 tablespoons chopped flat-leaf parsley
Equipment:
Equipment: an adjustable-blade slicer
Accompaniment: crusty bread (preferably a baguette)

Steps:

Cook french fries according to package instructions and keep warm in oven if necessary.
Meanwhile, cut onion into very thin slices with slicer, then cook with garlic and a pinch of salt in butter in a wide heavy medium pot over medium-high heat, covered, stirring occasionally, until pale golden.
While onion cooks, whisk together mustard and water until smooth, then whisk in mayonnaise and 1/4 teaspoon pepper.
Add wine to onion and briskly simmer, covered, stirring occasionally, until onion is almost tender, about 5 minutes. Add mussels and cook, covered, stirring occasionally, until mussels just open wide, 4 to 6 minutes, checking frequently after 4 minutes and transferring as cooked to a bowl. (Discard any mussels that remain unopened.) Stir parsley into cooking liquid and season with salt. Pour liquid over mussels, then serve with fries and mustard mayonnaise.