Wash/rinse spinach; do not dry. Add wet spinach to a stock pot and turn on medium/low heat. Preheat oven to 350 degrees. FSpray small baking dish with non-stick cooking spray.
In a mixing bowl stir together softened cream cheese, sour cream, mayonnaise, minced garlic, parmesan, mozzarella, and pepper (if you want to add some).
Take spinach out of pot and squeeze out as much excess liquid as you can.Chop drained spinach. Drain and chop the artichoke hearts. Stir artichokes and spinach into the cheese mixture.