Low-carb Zuppa Toscana soup

Ingredients:

• 1 tablespoon olive oil
• 1 pound Italian sausage (spicy or mild), casings removed
• 4 slices bacon, chopped
• 1 onion, diced
• 3 cloves garlic, minced
• 1 teaspoon red pepper flakes (adjust to taste)
• 4 cups chicken broth
• 1 small head cauliflower, chopped into small florets
• 1 bunch kale, stems removed and leaves chopped
• 1 cup heavy cream
• Salt and pepper to taste
• Grated Parmesan cheese for serving (optional)