Sentence examples for on this one from inspiring English sources

The phrase "on this one" is grammatically correct and can be used in written English.
It is typically used to refer to a specific thing or instance within a larger context. Example: "I've tried many different diets, but on this one, I finally saw results." Here, "on this one" refers to a specific diet that the speaker has tried. Another example could be: "There are many tasks to complete for this project, but we need to focus on this one first." In this case, "on this one" refers to a specific task within the project.