Spray a 9 X 13-inch baking pan with cooking spray and set aside.
Scrub potatoes but do not remove skin.
Slice each potato about ¼-inch thick and place in large bowl. Add garlic, paprika, parsley, salt, and pepper and toss together.
Put potato mixture into baking pan and bake at 375°. Bake uncovered about 30 minutes, turn and continue cooking about another 30 minutes or until potatoes are fork-tender and outside is slightly brown.