Made this Strata for Father's Day, it was as good as it looks. Easy to throw together and as you can see was a hit. You make it the night before and just throw into the oven about an hour before guest arrive.
3 tbsp unsalted butter
1 1/2 c onion, finely chopped (optional)
2 (10oz) packages of frozen chopped spinach (thaw and drain)
1 tsp salt (divided)
1/2 tsp pepper (divided)
dash of grated nutmeg
8 c French or Italian bread, cut into 1" cubes
2 c grated Gruyere cheese
2/3 c grated Parmesan cheese
9 lg eggs
1/2 tsp Dijon mustard
2 3/4 c milk
Remove from fridge 30 minutes before baking. Preheat the oven 350º. Bake uncovered until puffed, golden and cooked thoroughly- about 55 to 60 minutes. Let stand at least 5 minutes before serving.
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