Name: Rutabaga Gratin
Prep time: 20 min
Cook time: 50 min
Total time: 70 min
Yield: 6 servings
Ingredients: 3 1/2 to 4 lbs rutabaga (cubed); 1/2 cup onion (chopped); 3 tablespoons butter; 3 tablespoons flour; 1/2 teaspoon thyme; 2 cups milk; 1 cup sharp cheddar cheese (shredded); 1/2 cup gruyere cheese (shredded)