If I were to this that is the way I would do it...but no batting, just nonwoven fusible interfacing......then sew down with mono using a very tiny zigzag.....as you can tell, I am no good at needleturn and this is my way of achieving the look(as close as I can)....without the frustration....( for me anyway)

Needle-turn . . . hands down!

My cousin does needle turn. I've been practicing specifically with small points and inverted (heart) points. My sister loves little stuff and she makes little brooches and attaches them to seniors lapels where she volunteers couple times a week. I do the sewing and she does the attaching.

Looks like needle turn. It does't look flat like other methods.