I cut the light and the red stripe fabric the same size and layered them with the light on top. I basted the layers together along the outer edges. (You could pin them. You could also iron the fabric. I didn't have my pins, or iron, at the time I did this.)
|Silhouette placement on layered fabrics|
Using a sharp pair of small scissors I cut into the fabric inside the outline. I cut it little at a time, about 1/4 inch from the line. I cut small cuts into the seam allowance, down to the line, to help the fabric fold under better. (Like I learned when sewing curved seams when making clothing.)
I hand stitched the light fabric to the red stripe, folding the seam allowance inside just like in needle-turn applique. I actually used a red thread to match the silhouette fabric. I used the same stitch as in applique.
After the applique was completed I took out all the basting threads. I flipped the block over and using small sharp scissors trimmed the red stripe fabric, leaving a 1/4" seam allowance. Then I pressed the block.
It was really easy!