Preheat oven to 400°F (200°C).
In a non-stick skillet, melt butter and brown leeks. Cover and cook on very low heat for 15 minutes, stirring often. Leeks should be thoroughly browned and crisped. Lay mushrooms over leeks and cook 2 minutes. Remove from heat.
On a floured surface, roll out puff pastry to 1/4-in. (1/2-cm) thick. Place rolled out dough in a buttered shallow baking dish (or on a buttered baking sheet) and brush with beaten egg.
Cover centre of dough with cheese slices, leaving a 2-finger-wide space all round the edges.
Spread leeks over cheese and top with mushrooms in a decorative pattern.
Fold edges and crimp corners. Brush pastry beaten egg. Season and bake until golden brown (10-15 minutes).
Metro Richelieu inc. , its affiliated companies and affiliates are not responsible for any circumstance that should come up when using the suggested recipes. Each person using this site must check that each of the ingredients is allowed in his/her diet and is not part of his/her restricted foods.
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