Fench Bias/Double Fold Bias
Prepare your bias strips at 2 inches wide.
Fold the strip in half, wrongs sides facing
Lay the folded bias strip on teh right side of the fabric, raw edges together
Sew at 1/4 inch seam allowance
Now take the bias and fold it to the wrong side of the main fabric, just covering the first stitchline.
"stitch in the ditch", or along inside the seam on the right side, catching the bias on the reverse side as well
and that's it.