First make the chimichurri – you can do this a couple of days ahead. Put everything bar the oil in the small bowl of a food processor, blend smooth, then whisk in the oil until combined. Pour into a clean jar, seal and keep in the fridge until needed.
For this topic, you can choose any protein food from any region in the world you like. Collecting the data might be challenging, though. So you can look into something local.Once again, this quantitative research title about food should be narrowed down to specific food and location. For instance, studying how often people use a chosen fish preservation technique.