Bolognese Stuffed Bell Peppers

Name: Bolognese Stuffed Bell Peppers
Ingredients: 0.5 cup cooked rice; 2 tablespoons olive oil, divided; 0.125 cup minced carrots; 0.125 cup celery; 6 bell peppers (any color) stems and seeds removed, cut in half lengthwise; 0.5 pound ground beef; 0.25 pound pancetta or lightly smoked bacon, diced; 1.5 cups prepared marinara sauce; 0.25 cup red wine; 0.5 teaspoon red pepper flakes; 1/3 cup heavy cream; 0.5 cup grated Parmesan cheese, divided