You will need:
1 8 oz package cream cheese (I actually used Neufchatel)
1/2 cup mayonaise (I used light)
2 Tablespoons garlic powder
1 Tablespoon onion powder
1 package frozen spinach, thawed, drained, and chopped
1 cup cheese crumbles (I cut a block of cheese into small pieces)
Mix all ingredients together and refrigerate!