Brussels Sprouts and Bacon Gratin

Name: Brussels Sprouts and Bacon Gratin
Prep time: 15 min
Cook time: 25 min
Total time: 40 min
Cuisine: American
Ingredients: 12 ounces (340 grams) Brussels sprouts, rinsed, ends trimmed and cut in half; 4 slices bacon, chopped into small pieces; 1 tablespoon flour; 1 cup (236 ml) whole milk, hot; 1/8 teaspoon grated nutmeg; ¼ teaspoon salt; ¼ teaspoon ground black pepper; 1 cup (136 grams) cheddar cheese, grated; ¼ cup (34 grams) Parmesan cheese, grated