Ingredients
6 large beefsteak or heirloom tomatoes (about 3 1/2 pounds), such as Pink Brandywine, Marbonne, or Beefmaster, sliced crosswise into 1/2-inch slices
1/4 cup extra-virgin olive oil
Kosher salt and freshly ground pepper
10 thyme sprigs
Preparation
Preheat oven to 250 degrees with racks in upper and lower thirds. Fit 2 parchment-lined rimmed baking sheets with wire racks. Divide tomato slices evenly between racks. Drizzle both sides with oil. Season with salt and pepper; scatter thyme over top.
Bake, rotating sheets halfway through, until tomatoes are dry (but not crisp) and wrinkled, about 3 1/2 hours. Let cool completely.
Transfer tomatoes to a parchment-lined rimmed baking sheet; freeze until firm. Stack in airtight containers and freeze up to 1 year.
