Well done you for recycling! I have done the same and 'saved' a lot of fabric that would have ended up being thrown away. I have finished one and I am still in the process of finishing off a couple more quilts with these scraps. Amazing what you can achieve with the scraps. Beautiful miniature quilt! I would finish it off with a plain border unless you prefer to keep the theme and have a scrappy border framed between 2 plain 1/2"-3/4" plain borders? Either way would look lovely.