1. Preheat oven to 425 degrees. In a Dutch oven or large pot, heat oil over medium. Add onion and garlic; cook until lightly browned and softened, 5 to 8 minutes. 2. Add spinach in two additions adding a portion of the stock or water with each and cover with a lid. Let the first batch wilt before adding the next; cook until completely wilted, 5 to 8 minutes. Transfer to a colander; drain, pressing to release all excess liquid. 3. In the same pot, warm milk over high heat. Whisk in cream cheese until melted, about 3 minutes. Add spinach, Worcestershire sauce, hot sauce, and 1/2 cup mozzarella; stir to combine. Season with salt and pepper to taste. Pour into a lightly oiled 1 1/2-quart shallow baking dish; sprinkle with remaining 1/2 cup mozzarella. 4. Bake until bubbly and golden brown, 20 to 25 minutes. Serve hot with accompaniments, as desired. http://www.foodpeoplewant.com/hot-spinach-dip/