Crispy Smashed Potatoes. Boil potatoes until completely cooked, cool 10 min. Then toss potatoes with 3 tbsp olive oil making sure each is coated with oil. Pour onto a cookie sheet. Take a cup and “smash” each potato to about 1/3 – 1/2 in' thick. Drizzle another 3 tbsp olive oil on the potatoes, sprinkle with garlic salt & pepper. Place the potatoes in your 500 degree oven for 30 minutes. Can add shredded parmesan and bake up to 15 minutes more.