Picnic Pasta Salad with Roasted Tomato and Tuna

The fragrant aroma and soft, saucelike texture of slow-roasted tomatoes adds great dimension to this humble pasta salad. The mashed tomatoes help bind all the flavors together into a large bowl of comfort. Roast your favorite tomatoes of any shape or size, including cherry tomatoes, and if you want to make the dish extra pretty, use a collage of different tomato colors.