Heat olive oil in a pan over medium heat. Add garlic and saute for 1 minute, stirring frequently. Add artichoke hearts and spinach and saute until spinach is wilted. Add cream cheese, mayo, garlic powder, salt and pepper to the pan and stir to combine.
Transfer to a baking dish, top with parmesan and bake in the oven for 5 minutes. Turn oven to broil and cook for an additional 3-5 minutes, or until the top begins to brown.
Remove from the oven and serve with bread slices and/or tortilla chips.