Achieving perfectly sliced tomatoes, whether for a simple sandwich or a Caprese salad, hinges on using the correct kitchen tool: a serrated knife. Unlike chef's or paring knives, which can crush the delicate skin and soft flesh of ripe tomatoes, a serrated knife's sharp teeth saw through the fruit with minimal pressure.
The standard flat blade of a paring or chef's knife requires downward force. When this pressure is applied to a tomato's tender skin, it can cause the knife to slip and squish the fruit, especially if the blade is not perfectly sharp. This is due to the tomato's high seed and liquid content, leading to a soggy, misshapen result.
A serrated knife, however, operates differently. Its teeth are designed to grip and cut through the tomato's skin in a sawing motion, requiring little to no downward pressure. This technique preserves the integrity of the tomato's flesh, ensuring clean slices.
The size of the serrated knife can also be adapted to the tomato. For smaller tomatoes, a knife around 4 inches long may suffice. For larger varieties, such as softball-sized tomatoes, an 8-inch or longer serrated bread knife can be used to cut through the entire circumference in a single pass.
Investing in a good serrated knife, most of which cost less than $35, can prevent the common problem of mangled tomatoes and improve the presentation of dishes. The original version of this story was published on HuffPost.