Costoluto Genovese tomatoes are rich, meaty heirloom fruits. Since these plants are open-pollinated, seeds from the plants can be saved each year and grown for generations. Large, deep-red fruits have a singularly fluted profile, are deeply ridged, and heavily lobed. However, these highly acidic tomatoes really shine when used for canning and for the creation of full-bodied pasta sauces. Meaty, full-flavored, slightly tart, and delicious.