Add a label in the center of a polygon in MapKit

There are similarly named questions, like this one, but that is not what I'm looking for.

Basically I'm drawing a bunch of MKPolygons on a standard map giving them a stroke, a random colour etc.. I'd like to be able to "name" them, adding a label or perhaps a UIView with a label so it looks nice. Is this possible?

Here's how my map looks like

And here's the implementation

func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer {

    if overlay is MacaronMKPolygon {

        let macaronOverlay = overlay as! MacaronMKPolygon

        let polygonView = MKPolygonRenderer(overlay: macaronOverlay)
        polygonView.strokeColor = UIColor.gray
        polygonView.lineWidth = 1
        polygonView.alpha = shouldShowMacaron ? 1.0 : 0.0
        polygonView.fillColor = macaronOverlay.color
        return polygonView

    }

    return MKOverlayRenderer()
}