Spinach and Cheese Strata

Name: Spinach and Cheese Strata
Prep time: 25 min
Cook time: 55 min
Total time: 1 h 20 min
Yield: 8 servings
Cuisine: American
Ingredients: 1 package frozen spinach; 1½ cups onion; 3 tablespoons unsalted butter; 1 teaspoon salt; ½ teaspoon black pepper; ¼ teaspoon freshly grated nutmeg; 8 cups French or Italian bread; 6 oz Gruyère cheese; 2 oz Parmigiano-Reggiano cheese; 2¾ cups milk; 9 large eggs; 2 tablespoons Dijon mustard

A savory breakfast casserole layered with bread, spinach, Gruyère and Parmigiano-Reggiano cheeses in a custard base. This make-ahead dish needs to be chilled overnight for the perfect texture.

8 servings

9 hr 46 min

Published October 4, 2025

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Ingredients

•1 package frozen spinach
•1½ cups onion
•3 tablespoons unsalted butter
•1 teaspoon salt
•½ teaspoon black pepper
•¼ teaspoon freshly grated nutmeg
•8 cups French or Italian bread
•6 oz Gruyère cheese
•2 oz Parmigiano-Reggiano cheese
•2¾ cups milk
•9 large eggs
•2 tablespoons Dijon mustard

Cooking Instructions

1.
Squeeze handfuls of spinach to remove as much liquid as possible, then finely chop.
5 min
2.
Cook onion in butter in a large heavy skillet over moderate heat, stirring, until soft, 4 to 5 minutes. Add 1/2 teaspoon salt, 1/4 teaspoon pepper, and nutmeg and cook, stirring, 1 minute. Stir in spinach, then remove from heat.
6 min
3.
Spread one third of bread cubes in a buttered 3-quart gratin dish or other shallow ceramic baking dish and top evenly with one third of spinach mixture. Sprinkle with one third of each cheese. Repeat layering twice (ending with cheeses).
10 min
4.
Whisk together milk, eggs, mustard, and remaining 1/2 teaspoon salt and 1/4 teaspoon pepper in a large bowl and pour evenly over strata. Chill strata, covered with plastic wrap, at least 8 hours (for bread to absorb custard).
480 min
5.
Preheat oven to 350°F. Let strata stand at room temperature 30 minutes.
30 min
6.
Bake strata, uncovered, in middle of oven until puffed, golden brown, and cooked through, 45 to 55 minutes. Let stand 5 minutes before serving.
55 min

Ingredients

•1 package frozen spinach

•1½ cups onion

•3 tablespoons unsalted butter

•1 teaspoon salt

•½ teaspoon black pepper

•¼ teaspoon freshly grated nutmeg

•8 cups French or Italian bread

•6 oz Gruyère cheese

•2 oz Parmigiano-Reggiano cheese

•2¾ cups milk

•9 large eggs

•2 tablespoons Dijon mustard

Cooking Instructions

Squeeze handfuls of spinach to remove as much liquid as possible, then finely chop.

5 min

Cook onion in butter in a large heavy skillet over moderate heat, stirring, until soft, 4 to 5 minutes. Add 1/2 teaspoon salt, 1/4 teaspoon pepper, and nutmeg and cook, stirring, 1 minute. Stir in spinach, then remove from heat.

6 min

Spread one third of bread cubes in a buttered 3-quart gratin dish or other shallow ceramic baking dish and top evenly with one third of spinach mixture. Sprinkle with one third of each cheese. Repeat layering twice (ending with cheeses).

10 min

Whisk together milk, eggs, mustard, and remaining 1/2 teaspoon salt and 1/4 teaspoon pepper in a large bowl and pour evenly over strata. Chill strata, covered with plastic wrap, at least 8 hours (for bread to absorb custard).

480 min

Preheat oven to 350°F. Let strata stand at room temperature 30 minutes.

30 min

Bake strata, uncovered, in middle of oven until puffed, golden brown, and cooked through, 45 to 55 minutes. Let stand 5 minutes before serving.

55 min