Preheat oven to 400F (200C). Make a double batch of Melty Stretchy Gooey Vegan Mozzarella. You can do this ahead of time and keep the mozzarella in a air tight container in the fridge until you are ready to use it, or you can make it right before creating this recipe. It only takes 15 minutes! Add the mozzarella to an oven safe dish, along with the artichoke hearts, onion, garlic, spinach, 1/2 cup non-dairy milk, salt, and pepper. Give it a stir. It will probably lumpy and not really come together, but that's totally cool. Pop it in the oven for 20 minutes, stopping halfway to give it a stir. If it gets too thick, thin it by mixing it a bit extra non-dairy milk. Once fully cooked, you can optionally brown the top. To do this, turn your oven to broil, and put under the broiler for 3 minutes. Check continuously so that it doesn't burn, it browns fast!! Serve hot with bread or chips.