Save those wider-than-tall, about-to-burst tomatoes for slicing and showering with flaky sea salt. For this recipe, you want smaller, sturdier varieties like kumato, Campari or petite heirlooms. Brushing the uncooked puff pastry with crème fraîche adds a subtle tanginess that you won’t necessarily notice, but the tomatoes will taste better for it. You might be tempted to skip salting your tomatoes, but don’t: It helps prevent a soggy crust while intensifying the flavor of your tomatoes. This…