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Creamy Mixed Onions Gratin

Creamy Mixed Onions Gratin

Creamy Mixed Onions Gratin

Vidalia Onions

Creamy Mixed Onions Gratin pares well as a hearty fall and winter dish and also makes a great side on the holiday table.

I once read a sentiment comparing the scent of an onion cooking in a home as a sign of love, the idea that someone cared enough to cook a special meal for sharing. If you concur on that aromatic comparison, then imagine the wafting aromas of three different types of onions, a leek, and two cloves of garlic while cooking. Heavenly love.

white Spanish onions

Having planned to share this dish sometime in the fall, I fortunately happened upon it scrolling through recipe posts. The photo styling with the pumpkins and fall scenery in the background sort of determined post now or otherwise wait for a whole other year. I decided on post now.

yellow onions

You can easily use just one type of onion following the recipe proportion.

one leek

2 cloves garlic

The  yields enough for a bit more than a medium-sized serving spoon per diner which technically is about as much as most folks can fit onto their plates with all the other mains and sides set abundantly on a holiday table.

Creamy Mixed Onions Gratin

Yield: 8

Creamy Mixed Onions Gratin


  • 3 tablespoons butter
  • 1 Vidalia onion, halved, thinly sliced
  • 1 white Spanish onion, quartered, thinly sliced
  • 1 yellow onion, halved, thinly sliced
  • 1 leek, green part removed, sliced down center lengthwise, cleaned well, cut into thin half circles
  • 2 cloves garlic, chopped
  • 2 tablespoons flour
  • 1/2 cup dry sherry or white wine
  • 1/2 -3/4 cup half and half
  • 3/4 cup Gruyere, shredded
  • 1/4 teaspoon ground nutmeg
  • few pinches coarse kosher salt
  • half dozen grinds cracked black pepper
  • For the Topping:
  • 2 tablespoons butter
  • 1/2 cup bread crumbs or Panko breadcrumbs


  1. Melt butter on low heat in wide bottomed cast iron enameled pan, once melted, add in onions, leek, and garlic, stir throughout, cover with pot lid until mixture has cooked down
  2. Continue cooking on low heat around twenty minutes to a half hour stirring intermittently until onions are completely softened
  3. Sprinkle over the flour, stir through, cook two minutes
  4. Pour in the wine, increase heat to medium, cook to reduce around three to four minutes
  5. Add the half and half, heat until hot then tumble in the Gruyere, stir through until melted
  6. Sprinkle in nutmeg, salt and pepper, stir, check seasoning, adjust to taste
  7. Cook another few minutes to thicken, turn off heat
  8. Prepare the topping, melt butter in a small saute pan
  9. Tumble in the bread crumbs, stir with the butter and cook on medium heat a few minutes until slightly golden, stirring constantly to prevent burning
  10. Preheat oven to 350 degrees, transfer gratin mixture to a wide casserole, sprinkle the top with the buttered breadcrumbs
  11. Bake in oven until bubbling hot, around thirty five minutes, more or less
  12. Gratin may be prepared a day in advance. Cover and refrigerate cooked creamy onion mixture. Just before baking, cook breadcrumbs in the melted butter, sprinkle over the onions, and proceed baking until hot adding on additional fifteen to thirty minutes cooking time




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  • Hi, I'm Peggy. Welcome to our Shared Table at Spiced Peach Blog!
    Subscribe here for my fresh, seasonal recipes with an international twist.