Mashed Potatoes, Pears and Leeks Recipe

3-1/2 pounds Yukon gold potatoes, peeled and cubed
2 lbs. ripe pears, peeled, cored and thinly sliced
1 stick pareve margarine
2 cups sliced leeks [white and pale green parts only]

Brush 13x9 glass baking dish with margarine.
Steam 1/2 the potatoes and pears until tender, about 15 minutes. Repeat with remaining potatoes and pears. Add 6 tablespoons margarine and mash. Season with salt and pepper.
Melt 2 tablespoon margarine in large skillet. Add leeks, sauti until crisp tender, about 15 minutes. Mix 1/2 the leeks in to potato mixture. Transfer to prepared dish. Top with remaining leeks. Can be made ahead.
Warm in 350F oven about about 25 minutes if cold.