In a small bowl, whisk together water, oil, flour, and salt until well combined. The mixture will look thin and watery but don’t worry, that’s exactly what we want! If using food coloring, add a drop or two and mix well.
Heat a non-stick pan over medium-high heat. No need for additional oil! The oil in the batter will do the job.
Once the pan is hot, pour a small amount of batter using a small laddle or spoon or depending on the size you want into the center. It will immediately start bubbling and spreading. Let it cook undisturbed until the edges lift slightly and the tuile turns crispy.
Let it slowly cook until the oil splattering is stopped and you start to see the lace formation.
Carefully lift the tuile with a spatula and transfer it to a paper towel to drain excess oil. Let it cool completely, it will crisp up even more as it cools.