Heat a saucepan on medium low heat, when hot, add the shallots, sauté until softened, about 2-3 minutes.
Add the Chardonnay, stir to deglaze the saucepan and cook until the liquid evaporates, about 2-3 minutes.
Reduce the heat to low, stir in the cream and simmer until sauce has thickened, about 5 minutes.
Stir in the mustards until blended, taste and season with salt and black pepper as desired.
Pour into a gravy boat and garnish with parsley if desired. Serve with beef, pork, chicken, or even fish.