Preheat the oven to 325 degrees.
Lightly spray a pie pan with nonstick cooking spray.
In a medium bowl, whisk together the milk, eggs, sugar, vanilla, and melted butter until the sugar is dissolved. This takes a bit less than a minute.
Whisk the flour into the mixture until thoroughly combined. NOTE: No matter what I did, I had a few small lumps of flour, so I passed it through a wire sieve on the way to the pie dish.
Pour the mixture into the pie pan.
Place the cherries in the liquid, cut side down, spreading them out with your fingers.
I put the filled pie pan on a rimmed baking sheet so that it wouldn't spill.
Bake until the clafoutis is puffed up, especially on the edges, and golden brown. A knife inserted into the middle should come out mostly clean, although it will jiggle a little bit. The entire thing will deflate a bit as it cools.
Optional: let the clafoutis cool a few minutes and then dust the surface lightly with some powdered (confectioners) sugar. I put a small amount in a tiny wire sieve and tapped the edge over the clafoutis.
Serve warm or cool and store the leftovers, wrapped, in the fridge. Somehow, it is a very good breakfast food...just sayin'.
If you would like to see a video of some of the process, check out my Instagram: eileen_goodenoughkitchen