Oh yes of course, it's sarson. My bad. Big misconception corrected. My only association with saag was sarson ka saag, before I came to America, where I found it interchangeably used with palak in palak paneer.

From the website it looks like you are using spinach for this. In which case, Palak as a Service is actually the less misleading term. People associate Saag with either mustard leaves or at least a mix of green leaves. If it's only Palak, calling it saag might not be technically wrong but it's still not what people associate with that name.