French Apple Tart

Name: French Apple Tart
Prep time: 10 min
Total time: 10 min
Cuisine: European, Mediterranean, French
Ingredients: 4 sweet-tart apples, peeled, cored, and thinly sliced; 1/2 c. granulated sugar; Juice of 1/2 lemon; Pinch nutmeg; 4 tbsp. butter, cut into small cubes; 1 sheet puff pastry, thawed according to package directions; 1 large egg, lightly beaten; 3 tbsp. apricot preserves; 2 tsp. Grand Marnier or dark rum, optional