1 tablespoon olive oil
2 pints cherry tomatoes (about 4 cups), preferably a mix of colors
Kosher salt
Freshly ground black pepper
2 tablespoons balsamic vinegar
1 teaspoon honey
2 teaspoons chopped fresh thyme leaves, plus a handful of small sprigs for garnish
1 sheet frozen puff pastry (7 to 9 ounces, from one 1-pound box that contains 2 sheets), thawed but still cold, and corners cut off to make very rough 9- to 10-inch round