Fontina, Speck, and Onion Strata

  • Servings: 8

Photography: Bryan Gardner

Source: Martha Bakes


  • 3 tablespoons unsalted butter
  • 1 large sweet onion, preferably Vidalia (about 1 1/2 pounds), thinly sliced
  • 2 garlic cloves, minced
  • 2 teaspoons chopped fresh thyme
  • Coarse salt and freshly ground pepper
  • 10 large eggs, lightly beaten
  • 3 cups whole milk
  • 1 cup grated Parmigiano-Reggiano cheese
  • 10 cups day-old rustic bread (from 13 ounces), sliced 3/4-inch thick
  • 4 ounces sliced speck or ham, coarsely chopped (1 1/4 cups)
  • 2 cups shredded fontina (8 ounces)
  • Vegetable oil cooking spray


  1. Heat butter in a large high-sided skillet over high heat. Add onion, garlic, thyme; season with salt and pepper. Cook until lightly caramelized, 10 to 12 minutes (adjust heat if browning too quickly). Transfer onion mixture to a plate, and let cool.

  2. Meanwhile, whisk together eggs, milk, Parmigiano-Reggiano, and 1 teaspoon salt in a bowl. Shingle bread slices in a 10-by-14-inch oval baking dish layering with cooked onion mixture, speck, and fontina cheese. Pour over egg mixture, pressing bread gently into liquid. Refrigerate, covered, for at least 2 hours.

  3. Preheat oven to 325 degrees. Coat a large piece of parchment with cooking spray. Cover strata with parchment, then with foil. Bake for 1 hour. Uncover and raise oven temperature to 375 degrees. Bake until top is golden brown and crusty, 20 minutes more. Let rest for 15 minutes. Serve warm.


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