1Heat oven to 350°F. Spray 1-quart shallow glass baking dish or 9-inch glass pie plate with cooking spray.
2Place spinach in 2-quart microwavable casserole; add 1/4 cup water. Cover; microwave on High 2 minutes. Drain well, pressing spinach with paper towels to remove excess liquid. Chop spinach.
3In large bowl, beat cream cheese with spoon until smooth. Beat in mayonnaise, 3 tablespoons of the Parmesan cheese, the milk, garlic and basil until well blended. Stir in spinach and artichokes. Spread evenly in baking dish. Sprinkle with remaining tablespoon cheese.
4Bake 20 to 25 minutes or until thoroughly heated. Serve with baguette slices or raw vegetables.