Cut 2 pieces from fabric, one in main and one in contrast. Also cut 2 from interfacing. Using interfacing on both sides will make the tray extra sturdy.
Sew the pieces together with right sides together, leaving a 2-3? opening on the side. Use 1/4? seam allowance Clip corners and turn. Topstitch around at 1/8?. When you topstitch, you’ll also close the gap you left before.
Take out your pattern piece. Fold the tray fabric in half with the fabric you want on the OUTSIDE facing up. Pin the inner part of the pattern piece to the fold, centered.
Mark the corner points on both sides. Now fold the corners of the fabric tray in half like so.
Sew from the marked point down to create each corner. Repeat on all 4 corners and you’re finished!