Creamy Tortellini Soup with Sausage

Ingredients

• 14 ounces fresh cheese tortellini
  
• 1 tablespoon olive oil
  
• 1 tablespoon unsalted butter
  
• 1 red bell pepper, thinly sliced
  
• 1 pound mild Italian sausage, no casings
  
• 2 shallots, finely chopped
  
• 4 garlic cloves, minced
  
• 2 tablespoons tomato paste
  
• 1 cup puréed tomatoes or crushed tomatoes
  
• 4 cups chicken broth
  
• 1 cup heavy cream
  
• ¹/₃ cup grated Parmesan
  
• fresh thyme, for serving
  
• 1 teaspoon each: dried oregano, dried sage, smoked paprika, black pepper
  
• ¹/₄ teaspoon red pepper flakes, more for serving
  
• ¹/₄ teaspoon ground nutmeg
  
• salt, to taste