-
1
Squeeze out as much of the moisture as possible from the spinach, then chop finely.
-
2
Heat butter in a large skillet over medium heat.
-
3
Add in the fresh mushrooms and saute for about 10-12 minutes, or until they loose their moisture completely; remove to a bowl.
-
4
Add in onion with nutmeg, salt and cayenne and saute for 5 minutes (adding in the garlic the last few minutes) then stir in the chopped spinach; saute for 2 minutes.
-
5
Transfer the mixture to the bowl with the mushrooms; mix to combine slightly.
-
6
Butter a 4-quart casserole dish.
-
7
Spread 1/3 of the cubed bread into the prepared baking dish.
-
8
Top with 1/3 of the spinach/mushroom mixture.
-
9
Sprinkle with 1/3 of BOTH cheeses.
-
10
Repeat layering twice (ending with the cheeses).
-
11
In a bowl whisk together half and half, milk, eggs, mustard.
-
12
Pour the milk mixture evenly over the strata in the baking dish.
-
13
Cover with plastic and chill for about 8 hours or up to 24 hours or until the bread is absorbed in the milk.
-
14
When ready to bake, let the dish stay out at room temperature for about 40 minutes before baking.
-
15
Set oven to 350u00b0F (second-lowest oven rack).
-
16
Bake uncovered for about 45 minutes, or until puffed and golden brown.
-
17
Delicious!