The tomato tart is a classic summer dish. It stands alone as a great appetizer, makes a light brunch with an egg on top, or supports the lead as a charming side dish with grilled chicken or seafood. It has a surprise ingredient of cinnamon — borrowed from the dishes in the Mediterranean — that works to bring together the briny feta and rich tang of cream cheese into one glorious homage to tomatoes that you can pull together in just 15 minutes.