Preparation

• Cook bacon in large skillet on medium heat until crisp. Remove bacon. Set aside. Remove all but 2 tablespoons drippings from skillet. Add mushrooms and onion to skillet; cook and stir 6 to 8 minutes or until onion is tender and liquid has evaporated.

• Arrange 1/2 of the bread slices in single layer in 13x9-inch baking dish. Top with spinach, mushroom mixture, bacon and Parmesan cheese. Layer with remaining bread slices.

• Beat eggs in large bowl with wire whisk. Add milk, Italian seasoning, salt and pepper; mix well. Gradually pour into baking dish. Top with tomato slices. Sprinkle with Swiss cheese. Sprinkle lightly with additional Italian seasoning, if desired. Cover with plastic wrap. Refrigerate least 1 hour or overnight. (If refrigerated overnight, let strata stand at room temperature 1 hour before baking.)

• Preheat oven to 325°F. Bake 55 to 60 minutes or until center of casserole is set and top is lightly browned. Let stand 10 minutes before serving.