Roasted Smashed Potatoes -- America’s Test Kitchen. It is important to thoroughly cook the potatoes so that they will smash easily. Let the hot potatoes rest after they're parcooked so they won’t crumble apart when smashed, and drizzle potatoes with olive oil before and after smashing them so the oil reaches every nook and cranny. And finally, using another baking sheet balanced on top of the parcooked potatoes to smash them gives cracked patties in one fell swoop.
This was so easy -- and my three boys loved this!!!! I offered the little ones marinara sauce to dip it in but put seasoned sliced tomatoes on top for the rest of us. So easy. So good! -- (I might bake this in a pie crust next time)