I made these to take to a Christmas party a couple weeks ago. This was so incredibly easy, and yet got rave reviews. That's my kind of cooking - easy, but people think it's really special.
This basically has two ingredients: puff pastry and some kind of cheesey dip.
I cut the puff pastry into squares and poked holes in the center with a fork to keep the pastry from rising in the center where the filling was. Then I put a small spoonful of dip into the center of each one. I did three kinds: one was an artichoke spinach dip, one was a chevre and pastacio, and the third was blue cheese and pecan. I also did a few with just shredded mozzarella, a shake of dry oregano and a slice of cherry tomato. I also sprinkled a few grains of kosher salt across the top of each one, I thought it brought out the flavor a bit more.
I baked them in the oven until the pastry puffed and browned. I think it was around 350 for about 10 - 12 minutes (my oven is acting up lately so I'm never quite sure of the temperature). The first batch stuck to the baking sheet a bit, so after that I buttered the sheet before putting the pastry on. A sheet of parchment paper would have probably worked well too.
These were very popular at the party, and the leftovers were reheated the next day for another party. The artichoke spinach was definitely the most popular, but they were all good.