A rich and delicious strata that would be a nice feature dish at a brunch. This can be assembled a day ahead. Just cover and refrigerate before baking. This is another recipe from the Best of Bridge ladies. They are legends from my home town. Enjoy!
Preheat broiler. Cut baguette diagnoally into 3/4" thick slices. Brush both sides with butter and toast on baking sheet 3" from heat until golden, about 30 seconds each side.
Heat oil in frying pan over medium-high heat. Add onions and stir until golden. Add ham and saute until lightly browned. Set aside.
In large bowl whisk together eggs, milk, salt, nutmeg and pepper. Add toasted bread and toss gently. Transfer saturated bread to shallow 3 quart casserole, slightly overlapping slices. Place spinach and ham mixture between slices. Pour remaining egg mixture over all.
Sprinkle cheese over strata, slightly lifting baguette slices with a spatula to allow cheese to fall between all slices. Preheat oven to 350°F Bake strata in middle of oven for 45 minutes to 1 hour, or until puffed and edges of bread are golden and eggs are set.