Cauliflower au Gratin

Bahan-bahan (8 porsi)

• 8 cups cauliflower florets (about 1 large head)
• 2 tablespoons olive oil
• salt and pepper to taste
• 2 tablespoons butter
• 2 tablespoons all-purpose flour
• 2 cloves garlic (minced, optional)
• 1 cup milk
• 4 ounces cream cheese (softened)
• ¼ teaspoon salt (or to taste)
• ¼ teaspoon black pepper
• ½ teaspoon dry mustard powder
• 1 cup shredded sharp cheddar cheese (divided )
• ½ cup shredded Gruyere cheese ( or swiss cheese or additional cheddar)