Flounder Florentine

2 packages (10 ounces each) frozen chopped spinach, thawed, drained
1 pound fresh or frozen flounder or sole fillets, thawed
3 tablespoons chopped onion
2 tablespoons butter
3 tablespoons all-purpose flour
1/4 teaspoon salt
1/4 teaspoon pepper
1/8 teaspoon ground nutmeg
1-1/2 cups milk
1 tablespoon grated Parmesan cheese
1/4 teaspoon paprika

Sprinkle spinach in a 13-in. x 9-in. x 2-in. baking dish coated with nonstick cooking spray. Top with fillets.

In a large saucepan, saute onion in butter until tender. Stir in flour, salt, pepper and nutmeg until blended. Gradually add milk. bring to a boil; cook and stir for 2 minutes or until thickened and bubbly.

Pour over fillets; sprinkle with Parmesan cheese and paprika. Bake, uncovered, at 350° for 20 minutes or until fish flakes easily with a fork. Makes 4 servings.