(NOTE: if you haven't followed Dan on IG and Patreon, you really owe it to yourself. He's always posting great stuff!)
It's a fairly simple concept. Play a melody to a tune on ride cymbal only. See what sort of different sounds you can get out of the instrument and how they can represent that melody. Here's "Bemsha Swing".
I could lie and say in the last chorus that I was purposefully leaving out certain notes of the melody, but we've all been fed enough untruths lately to last a lifetime! In the context of my experimenting with the sounds, I missed a note here and there but even then, I think we get the general shape of the tune!
Now I'm not sure if Dan does this as well but I continued this idea by playing the same melody on the drum set, one piece at a time, until I had covered all the components of the instrument. I also did all the melodies "one limbed" at first. ( I later used two hands on the hi-hat for more options). I think this is a good way of concentrating on the composition and finding colours on each instrument without trying to get slick or busy.
So, that's it. I have already found this helpful in my never-ending quest to play more melodically. Have fun and stay tuned for some collaborative blogging in the near future!