try to buy good quality puff pastry. Sometimes you can buy a piece from your favorite bakery. Here in PDX, Grand Central sells really good stuff. Keep frozen and then thaw in fridge.
On a floured surface, roll the pastry out a bit. 1/8 inch is what I like. Place on a large baking sheet on parchment. Core and very thinly slice tart apples, leaving the skin on. Lay the apple slices decoratively on the pastry, in rows, or whatever you like. Heat oven to 375. Sprinkle with a generous amount of brown sugar. Try to get some sugar on all the apple slices. Bake until golden brown, until apples are tender, about 20-25 minutes. Slices beautifully with a pizza cutter.
and another thing. I have been making this appetizer for years, courtesy of my friend Marcy Blum, event planner extraordinaire. In a large skillet melt some butter. Add chopped onions and saute until they are golden brown and tender. Add chopped mushrooms and saute until they release their moisture and the liquid is mostly cooked away. I usually only add salt and pepper, I love the earthy mushroom flavor. When done, remove from heat and add cream cheese, mixing well.
Toast some bread. Spread the onion mushroom mixture on the toasted bread slices and just before serving, place in a 375 oven for about 10-12 minutes. Cut in about 9 pieces, if using bread from a loaf, and serve.
Made a mix of cooked roasted garlic, potatoes and cauliflower, mashed with lots of half and half, butter, horseradish, salt and pepper. Place in buttered baking dish. Saute scallions and combine bread crumbs with some melted butter. Sprinkle the scallions and bread crumbs over potato mixture. Bake till golden and piping hot, whatever that means.