Mushroom, Spinach and Four Cheese Lasagna

INGREDIENTS

20 oz

package fresh spinach, tough stems removed and washed

5 tbsp

unsalted butter

1/4 cup

shallots, minced

2 tsp

minced garlic

portobello mushrooms, stems removed, sliced and then cut in half

3/4 tsp

salt

1/2 tsp

freshly ground pepper

1/4 cup

flour

4 cups

whole milk

1/8 tsp

fresh grated nutmeg

2 1/2 cups

Parmesan, grated

15 oz

fresh ricotta

slices provolone, thinly sliced

1 1/2 cups

mozzarella

lasagna noodles, cooked al dente