Place the romaine lettuce on a cutting board with the stem end facing you. Slice the lettuce head in half lengthwise, then lay each half facing up on the cutting board. Make diagonal cuts to remove the core, then turn both halves to face down.
Cut (2 Options)
Option 1 - Strips: Cut each half lengthwise one more time so you end up with quarters. Rotate and slice the lettuce crosswise into thick strips, about 1/2-inch wide.
Option 1 - Shredded: Cut each half lengthwise two more times into thirds. Rotate and slice the lettuce crosswise into thin strips, about ⅛-inch wide.
Wash
Transfer the cut leaves to a large bowl or sink of cold water. Gently swish the leaves around to dislodge any dirt or debris. Drain the water and rinse the leaves under cold running water. Use a salad spinner or gently pat the leaves dry with a clean kitchen towel or paper towel.