Spaghetti Squash Soup with Italian Sausage

Name: Spaghetti Squash Soup with Italian Sausage
Ingredients: 1 medium (about 3 pounds ) spaghetti squash , halved lengthwise and seeded; 2 tablespoons extra-virgin olive oil , divided; 12 ounces spicy Italian sausage , casings removed; Sea salt; 1 medium yellow onion , diced; 4 medium garlic cloves , minced; 1 ( 28 - ounce ) can whole fire-roasted tomatoes , undrained; 2 tablespoons tomato paste; 4 cups chicken stock , store-bought or homemade; 1/4 teaspoon ground cumin; 1/4 teaspoon ground cinnamon; 1/4 teaspoon dried oregano; 1/4 teaspoon crushed red pepper; 1/4 teaspoon ground white pepper; 1/4 teaspoon ground black pepper , plus more to taste; 2 cups Swiss chard , roughly chopped; 1 ( 15 - ounce ) can white beans , drained; Chopped sage , for garnish (optional)