Defrost your frozen spinach and squeeze it dry of any excess liquid. I usually use a large glass bowl to microwave it until it's defrosted. Then, use paper towels or a kitchen towel to squeeze dry the spinach. It has a lot of liquid and you want to get it as dry as possible. It should look like one big clump when you are done!
Drain the water from the can of artichokes. Cut each all the artichoke quarters in half.