Ingredients
½ diced onion
1 cup white wine
1 quart sauce espagnole
1 tsp Dijon mustard
2 Tblsp butter
Preparation
Sauté half a diced onion in butter, then add a cup of white wine and reduce to 2 oz. Add brown sauce and tsp Dijon mustard. Strain through a fine chinois and whisk in 2 Tblsp butter.
