Ingredients

  • 1 1/2 tablespoons unsalted butter, divided
  • 2 tablespoons olive oil
  • 1 cup chopped onions
  • 1 1/2 teaspoons salt
  • 1 teaspoon freshly ground black pepper
  • 1 teaspoon minced garlic
  • 2 pounds summer squash (about 6 medium), sliced into thin rounds
  • 2 pounds zucchini (about 6 medium), sliced into thin rounds
  • 1 teaspoon finely chopped fresh thyme leaves
  • 3 large eggs
  • 1/4 cup heavy cream
  • 1 cup crushed butter crackers
  • 1/2 cup grated Parmesan cheese, optional

Method

  • Preheat the oven to 350 degrees F. Grease a 9 by 13-inch baking dish with 1/2 tablespoon butter.
  • Heat the olive oil and the remaining 1 tablespoon butter in a medium pot over medium-high heat.
  • Add the onions, salt, and black pepper and cook until the onions are soft, about 5 minutes.
  • Add the garlic and cook until fragrant, about 30 seconds.
  • Add the squash and zucchini and cook until tender, stirring occasionally, about 20 minutes.
  • Stir in the thyme and remove from the heat.
  • Using a slotted spoon, transfer the vegetables to the prepared baking dish, reserving the cooking liquid.
  • Combine the eggs and cream in a medium bowl and whisk to blend.
  • Gradually whisk the reserved cooking liquid into the egg mixture.
  • When all the cooking liquid is incorporated, pour the mixture over the vegetables in the baking dish.
  • Using a spoon, gently shift the vegetables around so the egg mixture is evenly distributed.
  • Bake until the mixture sets, about 30 minutes.
  • Remove from oven and sprinkle first with the crackers and then with the Parmesan, if using, and return to the oven.
  • Bake until golden brown, 10 to 15 minutes.