Wild Mushroom Tart with Gruyère, Young Onions, and Herb Salad

Give me almost any combination of toppings, and I’ll turn them into a delicious savory tart. The formula is always the same: the crispy, buttery puff pastry crust; a creamy base of ricotta and crème fraîche; a layer of oozing, usually pungent cheese; and then, of course, the topping. In this case, I sauté an array of winter wild mushrooms until they’re tender, chewy, and still a little crisp. Since they seem to make everything taste better, I can’t resist tossing in a few handfuls of sweet young onions with their spicy green tops. As they all bake together, their flavors unite into this decadent and sophisticated “pizza.”