Orange Roughy Pasta Florentine

Coat a 2-quart casserole with cooking spray.

Add garlic. Microwave on High 30 seconds; add cornstarch and next 3 ingredients.

Gradually add milk, stirring with a wire whisk until blended.

Microwave on High 3 to 4 1/2 minutes or until slightly blended, stirring every 1 1/2 minutes.

Stir in spinach and fish. Cover with lid; microwave on High 4 minutes or until fish flakes. Let stand one minute.

Stir in cheese and serve over pasta.