Beef Stroganoff Cauliflower Casserole - Sugar-Free Mom

Ingredients

• 6 cups cauliflower florets
• 1/4 cup coconut flour (plus 2 tablespoons)
• 1/2 teaspoon salt
• 2 pounds beef sirloin (1/2 inch thick)
• 8 ounces mushrooms
• 1 cup onion (chopped)
• 1 garlic clove (minced)
• 1/4 cup butter
• 1 cup beef broth
• 1/4 teaspoon garlic salt
• 1 teaspoon Worcestershire sauce
• 4 ounces sour cream
• 8 ounces cream cheese
• 1 cup part skim mozzarella (shredded)
• 2 ounces tomato paste
• Optional: grated Parmesan