Instructions: Preheat oven to 450 F. Toss leeks, fennel and 3 tablespoons butter in roasting pan. Roast vegetables until tender, stirring occasionally, about 35 minutes. Cool. Reduce oven temperature to 425 F.

Whisk milk and yolks in small bowl. Heat 1 tablespoon butter in large saucepan over medium heat. Add flour; whisk 1 minute. Gradually whisk in milk mixture. Bring to simmer, whisking constantly; continue to whisk until sauce thickens slightly, about 3 minutes. Remove from heat. Stir in 1/4 cup cheese. Mix in vegetables. Season with salt and pepper.

Roll out pastry on floured surface to 12 inch square. Transfer pastry to 9 inch diameter glass pie dish. Trim overhang. Fill pastry with vegetable mixture. Sprinkle with 1/4 cup cheese and poppy seeds. Bake until crust is deep golden, about 25 minutes. Serve warm.

Team this dish with a mixed green salad for a delicious lunch.

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