Spinach and Pasta Bake

1 box (9 oz) Green Giant® frozen chopped spinach, thawed, squeezed to drain

1 jar (4 1/2 oz) Green Giant® sliced mushrooms, drained

1 cup Bisquick Heart Smart® mix

1 3/4 cups fat-free (skim) milk

1 1/4 cups fat-free egg product

2/3 cup grated Parmesan cheese

1 teaspoon salt

3/4 teaspoon pepper

1/4 teaspoon ground nutmeg

2/3 cup reduced-fat shredded Cheddar cheese