Ingredient:

• 2 tablespoons extra-virgin olive oil
• 1 yellow onion, chopped
• 1 red bell pepper, chopped
• ½ teaspoon salt, divided
• 2 cloves garlic, pressed or minced
• ½ teaspoon dried oregano
• ¼ teaspoon dried tarragon
• ¼ teaspoon ground cinnamon
• 1 can (15 ounces) diced or crushed tomatoes
• 1 can (15 ounces) pumpkin purée
• 1 to 2 tablespoons butter
• 1 to 2 teaspoons balsamic vinegar
• Freshly ground black pepper
• Finely grated Parmesan and chopped fresh parsley, for garnish (both optional)