Any lesson in veggie preparation wouldn't be complete without a dish for tian, and Martha Stewart demonstrates how to make the timeless side meal in this video. The approach comes from the Provence region of France and takes its name from the earthenware baking dish it's cooked in. You'll use this recipe all year long, since it can easily adjust to whatever veggie happens to be readily available and fresh. Get the dish here: #MarthaStewart #Recipe #Vegetable…