Assemble this rustic, open-faced tart ahead of time, refrigerate and bake just before serving. Excellent as an appetizer for entertaining or with a salad for a light meal.

Makes 6 to 8 serving

1. In large non-stick skillet, cook onion in butter over medium heat fr about 5 minutes, until softened.
2. Add brown sugar, balsamic and ground pepper and cook for bout 10 minutes, stirring often, until caramelized. Set aside.
3. In another skillet, cook duck breast over medium heat for about 5 to 6 minutes, skin side down, until crisped. Cool slightly, then thinly slice.
4. Gently unfold pastry sheet and place on a lightly flour-dusted work surface.
5. Roll pastry, eliminating creases, to a 10 X 12-inch (25 X 30 cm) rectangle. Cut rectangle in half lengthwise to make two 5 X 12-inch (12.5 X 30 cm) rectangles.
6. Transfer both to a parchment-lined baking sheet.
7. Using a small knife, score ½-inch (1 cm) border (do not cut through) around the inside edges of each rectangle.
8. Whisk egg yolk with 1 tsp (5 ml) water and brush a little along the borders (discard remaining).
9. Spread half onion mixture on each rectangle (avoiding edges), then top with alternating and overlapping slices of duck and pear.
10. Sprinkle evenly with shredded cheese and rosemary.
11. Bake at 400 F for about 25 minutes or until pastry is browned.
12. Cut into slices to serve.