Onions au Gratin with Parmesan & Sherry
Tender, sweet onions with briny olives and cheese make a great side dish or appetizer to serve on toasted baguette slices.
Test Kitchen Tip
Choose sweet onions for this recipe, such as Vidalia, Walla Walla, or Maui.
Preheat oven to 400°.
Melt butter in a large cast-iron or other ovenproof skillet over medium heat. Add onions, stirring until slightly softened; cover and cook until completely softened, 10 minutes.
Combine Parmigiano-Reggiano and Gruyère, then stir ½ cup of cheese mixture into onion mixture. Top with remaining ½ cup cheese and bake until cheese is bubbly and browned, about 20 minutes.
Remove and discard thyme sprigs and bay leaves. Sprinkle olives over onions and let cool slightly. Serve Onions au Gratin with baguette slices.
Per 1/4 cup
% Daily Value*
Total Fat 4g 6%
Saturated Fat 2g 10%
Cholesterol 10mg 3%
Sodium 103mg 4%
Carbs 6g 2%
Fiber 1g 4%
*Percent Daily Values are based on a 2,000 calorie diet.