Bison Shepherds Pie

Name: Bison Shepherd's Pie
Ingredients: 2 tablespoons extra-virgin olive oil, divided; 2 pounds ground bison meat* or ground beef; 2 cups chopped onions; 8 ounces mushrooms, finely chopped; 1 tablespoon tomato paste; 3 tablespoons chopped fresh thyme; 2 tablespoons all purpose flour; 2 cups low-salt chicken broth; 1 cup dry red wine; 2 cups diced peeled carrots; 2 cups frozen green peas, thawed; 2 pounds Yukon Gold potatoes, peeled, cut into 3/4-inch pieces; 1 large head of cauliflower (about 1 1/2 pounds), cored, coarsely chopped; 1 /2 cup (1 stick) butter, room temperature; 1 /4 cup whipping cream; 2 1/2 cups freshly grated Parmesan cheese, divided (about 8 ounces); 3 tablespoons finely grated peeled fresh horseradish or prepared horseradish; Extra-virgin olive oil for drizzling; Chopped fresh Italian parsley; Smoked paprika**