Step 1

Microwave spinach according to package directions; drain.

Step 2

Meanwhile, mix the oil, flour, and milk in a saucepan, stirring to remove any lumps. Cook over low to medium heat, stirring constantly, until mixture thickens and is bubbling, about 10 minutes.

Step 3

Remove milk mixture from the heat and stir in dressing, black pepper, garlic powder and cooked spinach until combined. Serve warm.