This vegetarian dish offers comforting flavors, making every bite of our Spinach, Mushroom, and Gruyère Strata satisfying to the last helping.
Spinach, Mushroom, and Gruyère Strata
Makes 6 servings
Ingredients
- 8 cups 1-inch-cubed French bread
- 9 large eggs
- 2 cups whole milk
- 2 tablespoons Dijon mustard
- 1 teaspoon kosher salt, divided
- ½ teaspoon ground black pepper, divided
- 4 tablespoons unsalted butter
- 1 tablespoon vegetable oil
- 1 white onion, diced (about 1 cup)
- 2 (8-ounce) packages baby portobello mushrooms, coarsely chopped
- 1 clove garlic, minced
- 1 (12-ounce) package frozen spinach, thawed and squeezed dry
- 1 cup freshly grated Parmesan cheese
- 2 cups shredded Gruyère cheese
Instructions
- Preheat oven to 350°.
- On a rimmed baking sheet, arrange bread cubes.
- Bake until lightly toasted, 2 to 3 minutes.
- Spray a 2-quart baking dish with cooking spray.
- In the container of a blender, process eggs, milk, mustard, ½ teaspoon salt, and ¼ teaspoon pepper until smooth.
- In a large skillet, melt 2 tablespoons butter with oil over medium-high heat. Add onion, and cook, stirring frequently, for 5 minutes. Add mushrooms and remaining 2 tablespoons butter, and cook, stirring occasionally, until soft and slightly golden brown and most of moisture has evaporated, about 8 minutes. Add garlic, and cook, stirring constantly, for 1 minute. Add spinach, and cook, stirring constantly, for 2 minutes. Stir in remaining ½ teaspoon salt and remaining ¼ teaspoon pepper until combined. Remove from heat, and let cool for about 5 minutes. Stir in bread cubes and Parmesan until combined. Spoon into prepared pan. Pour egg mixture on top, and gently press down to soak all pieces of bread. Let stand for 20 minutes, or cover and refrigerate overnight.
- Bake, uncovered, until almost set in center, 50 minutes to 1 hour. Sprinkle Gruyère on top, and bake until cheese is melted and golden brown and center is set, 10 to 15 minutes more. Let cool for 5 minutes before serving.
I cut this in half, is the baking time the same?
Hi Pat,
Thank you for reaching out! A half recipe of this will bake in less time than the full recipe, but we cannot say how much less since we have not tested it. It will also depend on the size pan you use. We would recommend trying around 35 to 40 minutes. Look for the center to be set, and we would recommend you start checking it after 30 minutes and go from there until it is done. Enjoy!
A half of a recipe will bake in the same amount of time if you use a smaller pan. I did it and baked the same.