Cauliflower Casserole

Ingredients (12)

• 2 medium heads of cauliflower cut into bite-size florets (about 3–4 pounds cauliflower, prior to being cut, or 5–6 cups florets)
• 2 tablespoons extra-virgin olive oil
• 1 teaspoon garlic powder
• 3/4 teaspoon kosher salt
• 1/2 teaspoon ground black pepper
• 1/4 teaspoon ground nutmeg
• 6 slices bacon
• 4 ounces reduced-fat cream cheese at room temperature
• 1/4 cup nonfat plain Greek yogurt
• 2/3 cup freshly grated Gruyere or similar melty, nutty, alpine-style cheese, divided
• 1/4 cup finely grated Parmesan cheese divided
• 3 tablespoons fresh chives chopped