White Sauce

• 2 tablespoons unsalted butter
• 3 tablespoons finely chopped onion
• 3 tablespoons finely chopped celery
• 3 tablespoons finely chopped carrot
• 2 tablespoons finely chopped prosciutto
• 1 tablespoon all-purpose flour
• 1 1/2 cups whole milk
• 3 flat-leaf parsley sprigs
• 3 thyme sprigs
• 1 bay leaf
• 1/4 teaspoon salt
• Dash of freshly ground white pepper
• Freshly grated nutmeg (optional)

1. Place butter in a small saucepan over medium-low heat. Add onion and next 3 ingredients (through prosciutto) to pan, and cook 10 minutes (do not brown), stirring occasionally. Sprinkle flour over onion mixture, and cook 2 minutes, stirring constantly.
2. Gradually add milk to flour mixture, stirring with a whisk until smooth. Add herbs and bay leaf; bring to a simmer. Simmer 10 minutes or until thickened, stirring frequently. Strain mixture through a fine sieve over a bowl; discard solids. Stir in salt, pepper, and nutmeg, if desired.

unsalted butter, onion, celery, carrot, flour, milk, parsley, thyme, bay leaf, salt, ground white pepper, nutmeg

Taken from www.myrecipes.com/recipe/white-sauce (may not work)