How to Make Homegrown Sun-dried Tomato, Feta, & Caramelized Onion Tart w/Arugula

My friends and I pull out all the stops for our annual pie party competition and this year I liked my tomato tart entry enough that I’ve made it several times since November. It is becoming a quick potluck favorite.  I make it either as a large tart or as mini tartlets. It’s delicious! The recipe calls for soaking the…