Heart Healthy Cheese Strata Recipe
Lightly coat a 6 x 8-inch baking dish with nonstick cooking spray.
In a large skillet, heat oil over medium heat until hot. Add the onion and cook, stirring, until soft, about 4 minutes. Add the salt, pepper and nutmeg and cook, stirring, for 1 minute. Stir in spinach. Remove from heat and set aside.
Spread one-third of bread cubes into prepared baking dish and top evenly with one-third of spinach mixture. Sprinkle with one-third of each cheese. Repeat layering twice (ending with cheeses).
In a large bowl, whisk together milk, eggs, mustard, and black pepper to taste and pour evenly over strata. Chill strata, covered with plastic wrap, for at least 8 hours or overnight.
Let strata stand at room temperature for 30 minutes.
Preheat oven to 350°. Bake strata, uncovered, in middle of oven until puffed, golden brown, and cooked through, about 45 minutes. Let stand for 5 minutes before serving. Serve immediately.