Slice olives, peppers, jalapenos, and celery, and set aside. In a small bowl, whisk together dressing ingredients. Dressing should be relatively thin, so it can easily coat pasta. Adjust seasonings per preference.
Bring a pot of water to a boil and cook macaroni until tender. Pour pasta into a colander and rinse with cold water to cool pasta and stop pasta from overcooking (aka getting mushy).
Drain pasta and add to a large mixing bowl. Add dressing and toss well. Add vegetables and toss again.
Finally, flake tuna and add to pasta, mixing until all ingredients are well incorporated. Serve immediately or save for quick weekday meals.
Note: Once chilled, dressing will be mostly absorbed by pasta. You may want to make additional dressing and toss again before eating.