I like to use the freezer paper method. Trace the design on freezer paper cut it out. Iron it onto the right side of the fabric, cut it a little bigger than the freezer paper. Using a glue stick on the edges turn the edges over to the wrong side. then peel the paper off and use spray adhesive or glue stick to position it in place on your block, then stitch the edges down with whatever stitch appeals you.
I think this is easier than needle turn and hold up better than raw edge.
here is an applique i did with this technique.
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