PREPARATION:
- Spread bread with butter; arrange in single layer in greased 13X9-inch baking dish. Sprinkle with cheeses.
- Combine milk, eggs, spinach, salt and pepper in large bowl; stir well. Pour over bread and cheese. Cover; refrigerate at least 6 hours or overnight.
- Preheat oven to 350°F. Bake strata, uncovered, about 1 hour or until puffy and lightly golden.
