Creamiest Mushroom Ravioli with Parmesan and Heirloom Grape Tomatoes

Bring a large pot of salted water to a boil. Wash and dry all produce. Trim and slice mushrooms into ¼-inch-thick pieces. Halve, peel, and thinly slice shallot. Halve tomatoes. Pick a few parsley leaves from stems for garnish; finely chop the rest of the bunch.