White Wine Braised Short Ribs with Buttered Mushroom Cream Sauce.

Ingredients

• 6 tablespoons salted butter
• 2 cups dry white wine, such as Pinot Grigio or Sauvignon Blanc
• 1 pinch crushed red pepper flakes
• 1 tablespoon fresh chopped sage
• 1 cup heavy cream
• 4 sprigs fresh thyme + 1 tablespoon thyme leaves
• 2 medium yellow onion, thinly sliced
• 2 bay leaves
• 4 cloves garlic, smashed
• mashed potatoes, for serving
• 5 pounds bone-in beef short ribs
• 1/3 cup grated parmesan
• kosher salt and black pepper
• 2 tablespoons Dijon mustard
• 1 1/2 cups low sodium chicken broth
• 2 pounds mixed mushrooms, roughly torn