Chicken Tetrazzini with Mascarpone Cheese - Better Than Bouillon

Ingredients

• 8 tablespoons butter (divided)
• 2 tablespoons olive oil
• 1 pound button mushrooms, rinsed, trimmed, patted dry and sliced (set aside)
• 4 cloves garlic, minced
• .75 cup finely chopped yellow onion
• .25 teaspoon ground thyme
• .33 cup dry sherry
• 1 package (8-ounce) mascarpone cheese
• 4 cups chopped cooked chicken (bite-size pieces)
• 12 ounces uncooked linguine
• 1 1/2 tablespoons Better Than Bouillon Roasted Chicken Base
• 1 1/2 cups water
• 3 tablespoons flour
• 2 1/2 cups half-and-half, room temperature
• 1 cup heavy cream, room temperature
• .5 teaspoon black pepper
• 1 teaspoon freshly ground nutmeg
• 1 1/2 cups frozen baby peas, thawed
• 1 cup panko breadcrumbs
• 1 cup freshly grated Parmesan cheese