You can take pelon or used dryer sheets, trace your pattern
onto the pelon, tack the pattern to the back of your quilt block, lay your 1st fabric right side up on the front of the block, now from the back side saten stich on the pattern,then you turn your block over and cut away excess
fabric close to your stiching. Now place next color of fabric on the right side of quilt block and turn it over
and saten stich on the pattern, do you see where I'm going with this. Another nice thing about appliqueing this way you only have to change your bobbin thread and not the top thread.
GG