Tomato-Pimento Cheese Galette

Preheat the oven to 400°. Cut about 2 lb. tomatoes into ½" slices. (I like heirloom or beefsteak, but even cherry tomatoes work if you just slice them in half.) Sprinkle them on both sides with about 1½ tsp. kosher salt, then let them drain on paper towels for about 10 minutes.