or canned tomatoes

Canned tomatoes are processed tomato fruits preserved in metal or glass containers, typically with added salt, citric acid, and sometimes tomato juice or puree to maintain texture and acidity. This preservation method extends shelf-life indefinitely while retaining much of the fruit's nutritional content and flavor compounds. Canned tomatoes originated as a commercial product in the 19th century and became a staple of pantry cooking worldwide. Common varieties include whole peeled tomatoes, diced tomatoes, crushed tomatoes, and tomato paste or puree, each processed to different degrees of fragmentation and cooked for varying lengths of time before canning.

Canned tomatoes are typically sourced from paste tomato varieties (plum tomatoes such as San Marzano), which have higher solids content, fewer seeds, and better concentration of sugars than fresh slicing tomatoes. The canning process involves harvesting ripe fruit, washing, sorting, cooking briefly to inactivate enzymes, peeling (mechanically or by lye bath), and packing into sterilized containers with brine before high-temperature sealing.

Canned tomatoes are foundational to numerous global cuisines, particularly Mediterranean, Latin American, and Asian cooking traditions. They serve as the base for sauces (marinara, salsa, curry), soups (minestrone, tomato bisque), stews, and braises where their concentrated flavor and consistent availability make them preferable to fresh tomatoes outside the growing season. Whole canned tomatoes are crushed by hand or left intact in dishes like shakshuka and Italian pasta sauces, while diced varieties work well in salsas, chilis, and grain-based dishes. Crushed and puree forms are ideal for long-simmered preparations where further reduction is desired. Canned tomatoes pair well with garlic, basil, oregano, cumin, and chili peppers.