These gorgeous little tomato tarts are bursting with summer flavor and a hint of heat from pepper jack. Enjoy them at your next barbecue, picnic, or cocktail party. This recipe works best with very cold or frozen ingredients. I like to put my flour, butter, and cream cheese in the freezer so that it is very cold when I start. Also, this dough may look totally unusable when you pour it out of the food processor, but it will come together. I promise this is the most forgiving pie crust ever.