Blend all ingredients in a food processor or blender. Serve as dip for pita bread, crackers, or veggies, or as a delicious sandwich spread with red onion, lettuce, and tomato. Make small incision around equator of apple to prevent bursting. Create a cavity with melon baller or spoon, leaving bottom of apple intact. Add walnuts, raisins, cinnamon, and vanilla.
Stuff apples with the mixture.
Place in baking dish with enough water and any remaining stuffing mixture to cover bottom. Cover and bake at 350 for 25 minutes or until a toothpick is easily removed. Meanwhile, cook shells in boiling water until just tender. Drain and set aside. Mix in chopped spinach and fill shells with mixture.