Roasted Tomato and Ricotta Crostini

Preheat oven to 300 degrees. On a rimmed baking sheet, drizzle olive oil over tomatoes and season with salt and pepper. Bake until tomatoes are very soft and skins have burst, 1 hour. (Refrigerate roasted tomatoes in an airtight container, up to 3 days.) Divide cheese among crostini and top with roasted tomatoes. To serve, drizzle with oil and vinegar and season with salt and pepper.