2. Drain the potatoes (you may use the same water to blanch the green beans, below), then plunge them into a large bowl filled with ice water to stop the cooking. When they're cool, drain again. Toss them in a large roasting pan with the olive oil and the garlic.
3. Preheat the oven to 500 degrees Fahrenheit. Roast the potatoes, tossing them occasionally, until completely tender and lightly browned, 15 to 20 minutes. Toss with the parsley, salt, and pepper, and serve.
"The happiest people in the world interact about 7 hours a day," says Dan Buettner, author of Thrive. "They don't just wake up in the morning and schedule 7 hours of interaction. A lot of it happens to revolve around food and the rituals that surround food." Buettner circled the globe in search of the world's happiest populations -- he shares four tips with The Splendid Table.