Preheat oven to 375 F.
In a pan, saute the garlic until browned in olive oil. Then add spinach and saute until wilted. At that point, go ahead and add the artichoke hearts. Stir together.
Now, add the sour cream, cream cheese, mozzarella, and parmesan. Season with salt, pepper, and red pepper flakes. Mix together until melted and creamy. Set aside.
Remove the top of the sourdough bread bowl. Cut it into large croutons.
Cut inside the bread bowl around the edges but do not hit the edges and then scoop out the extra bread and cut that into large croutons as well.
Spray the bread with olive oil or drizzle some, then sprinkle with Veggie Season's Parmesan Herb and Roasted Garlic butter seasoning for extra flavor. The Veggie Season's spicy herb seasoning goes great with this too if you like a tad of heat. Do this to the bread bowl as well.
Add the spinach mixture into the bread bowl. Cover with some mozzarella cheese. Place the bread bowl on a baking pan along with the croutons.
Bake for 15 minutes then broil for 2 minutes. Enjoy warm or room temperature!