I do individual tomato, pesto and mozzarella tarts with a rocket side salad. It is quick, easy, and have yet to find someone who wasn't impressed It is my failsafe - and you can prepare all of it ahead, and just sling together at last minute.
Get some ready rolled puff pastry. Cut out a tart base per person - I use a small dessert bowl and cut round that.
Spread with a heaped teaspoon of pesto, leaving about a 1.5cm margin around the edge.
Cover with sliced plum tomatoes - I use because of the slight oval shape, but any flavourful tomato will do
Salt, and just a teeny bit of sugar
Rip up some mozzarella and scatter over
Rip up some fresh basil and scatter over
Drizzle with a little extra virgin olive oil
Black pepper
Brush the bare pastry edges with a bit of milk
Cook in oven for approx 15 mins until pastry looks cooked and cheese is a bit brown.