Before you begin weaving the border ensure that the stakes are wet by spraying them or dipping them in water.
Select a stake near the middle of a side without a handle area. Take this stake behind the two stakes to its right and out towards you between the 2nd and 3rd stake to the right. See the first photo.
Take the next stake to the right of the first, take it behind the two to its right, over the first stake, and out between its 2nd and 3rd neighbours to the right. See the second photo. Continue to the right with this "behind two and out" pattern until two stakes remain, as in the next photograph.
Take the left hand of these stakes behind the remaining stake and through the space indicated on the next photo. (That is through the gap between the 2nd and 3rd stakes to its right.) Take the last stake to the inside of the tray and out through the gap indicated in the photo, the gap between the 2nd and 3rd stakes to its right.