Slow Cooker Mustard Marsala Chicken

Ingredients

• 2 teaspoons kosher salt
• 3 lbs bone-in chicken thighs (about 8 thighs)
• 1 tablespoon unsalted butter
• 1 tablespoon extra-virgin olive oil
• 1/2 cup shallots (diced)
• 1/2 cup Marsala wine
• 1/2 cup dry white wine
• 1/4 cup balsamic vinegar
• 8 sprigs of fresh thyme (tied together)
• 1 fresh bay leaf (torn in half)
• 3/4 cup low-sodium chicken stock
• 3 tablespoons Dijon mustard
• 1 teaspoon ground mustard
• 1 teaspoon sugar
• 2 tablespoons flour