Shepherds Pie with Mushroom Onion Gravy

Name: Shepherd's Pie with Mushroom Onion Gravy
Ingredients: 2 pounds russet potatoes, washed, peeled and cut into chunks; 1 clove garlic, smashed; Salt; 6 tablespoons butter; 1/2 cup heavy cream; Freshly ground black pepper; 2 tablespoons vegetable oil; 1 1/2 pounds ground beef (85 percent lean); 2 teaspoons Worcestershire sauce; 1/2 teaspoon cayenne pepper; 2 tablespoons tomato paste; 1/2 cup low-sodium beef stock; 1/2 large onion, finely chopped; 1 red bell pepper, julienned; 2 zucchini, julienned; 2 carrots, peeled and grated; 1 teaspoon Hungarian hot paprika, plus more for garnish; 4 ounces Havarti cheese, grated; Mushroom Onion Gravy, recipe follows; 1/2 large onion, chopped; 8 ounces white button mushrooms, sliced; 3 tablespoons oil; 3 tablespoons all-purpose flour; 1 cup red wine; 2 cups beef broth; Salt and freshly ground black pepper