tomatoes (it's the big can in the grocery store
Rich in lycopene, a powerful antioxidant associated with reduced disease risk, and provide significant amounts of vitamin C, potassium, and vitamin K. The heat processing makes lycopene more bioavailable than in fresh tomatoes.
About
Canned tomatoes are preserved tomatoes processed by heating and packing in liquid (typically tomato juice, puree, or brine) within airtight containers, a method developed in the 19th century to extend shelf life. The most common large-format canned tomato available in grocery stores is the whole peeled tomato, typically derived from Roma or San Marzano varieties grown in regions like California, Italy, or South America. Canned tomatoes retain the acidity and umami character of fresh tomatoes while developing concentrated tomato flavor through the preservation process. Other canned formats include diced, crushed, sauce, and paste, each with varying degrees of preparation and texture.
The large cans (typically 28-32 oz) represent a concentrated, economical product that has become foundational to modern cooking. The heating process denatures cell walls, making the tomatoes more tender and the lycopene and other phytonutrients more bioavailable than fresh fruit.
Culinary Uses
Canned tomatoes serve as a primary building block in countless cuisines, particularly in Mediterranean, Latin American, and Asian cooking traditions. They are essential to Italian pasta sauces, Spanish paella, Mexican salsas and moles, Indian curries, and North African tagines. The concentrated flavor and consistent quality make canned tomatoes preferable to fresh tomatoes in many cooked applications, especially during off-season months. The large whole canned tomatoes are typically crushed by hand or broken apart during cooking to distribute flavor throughout soups, stews, braises, and sauces. Canned tomato products are particularly valued for long-simmered dishes where deep tomato flavor is desired.