unbeatable roast potatoes

I make the BEST roast potatoes. Hands down. And here's how to make 'em. First of all, use small potatoes, I use organic baby chats. Put them in a pot of salted tap water and bring it to the boil. Boil them until they're almost cooked through, then put them on a tray and press down on them til they break open. Drizzle good olive oil over them and sprinkle fresh rosemary and rock salt (be generous). Roast in a hot oven for about 20 minutes - making sure they're cooked through and have that delicious brown crunchy crust. They're so moreish and are the highlight of a dinner party.