Keto Cauliflower Mac and Cheese

Ingredients:

• 1 large head of cauliflower, chopped into small florets
• 1/2 cup heavy cream
• 1/2 cup sour cream
• 2 cups shredded cheddar cheese
• 1/4 cup grated Parmesan cheese
• 1/2 teaspoon garlic powder
• 1/2 teaspoon onion powder
• Salt and pepper to taste
• Optional: chopped fresh parsley or chives for garnish