Preheat oven to 425°F (220°C). Cover potatoes with cold water in medium saucepan and bring to a boil over high heat. Reduce heat to low and simmer covered until barely fork tender, about 3 minutes; drain. (Potatoes should still be quite hard, or they will be mushy when you roast them.)
Meanwhile, in small bowl whisk Becel® Buttery Taste margarine* with lemon juice. Turn potatoes into baking dish, then toss with lemon juice mixture. Bake, stirring occasionally, until golden and cooked through, about 20 minutes.