
4 slices bacon
½ cup panko bread crumbs
¼ cup grated Manchego cheese (1 ounce)
1 head cauliflower, cut into florets (8 cups)
¼ cup butter
⅓ cup all-purpose flour
1½ teaspoons kosher salt
½ teaspoon ground white pepper
¼ teaspoon ground nutmeg
2 cups 2% milk
4 ounces Gruyère cheese, shredded