My inner quilter thought those blocks would look fabulous set on point. But what to do about the triangular spaces along the edge?
Why modify the pattern, of course! Doubtless I have reinvented the wheel (or triangle in this case), but the pattern chose me. I had to obey. Patterns sometimes make suggestions.

It's not particularly impressive at first glance. But look how that triangle fits right in with the other squares. A joke's in there somewhere, I'm sure. And yes, the triangle was knit from the same Noro Kureyon colorway as the block underneath and to the left of it.

Right now I don't want to think about sewing all those pieces together. That's a dead of winter project. There are Noro scraps to rummage through and many more triangles to knit before the general assembly takes place.
Knitting the final blankie border should rank right up there with the Cruciatus curse. I plan to pick up about a gazillion stitches along one side and knit 10 garter bumps (20 rows) before casting off. Repeat. THREE times!!! This fantasy of mine will nicely mirror the log cabin frame on each block. Then it's time to add an icord for wear and stability. I may wimp out, knit an icord border and call it good. Depends on whether the blankie is big enough to cover me and the cat.
And yes, I could knit a part of the final border on the hypotenuse of each triangle. However, all those seams through the outer edge would mess with my perfectionistic tendencies something fierce. Making it hard on myself. That's just how I roll.
One step at a time. Knit the triangles first. Here's the pattern:
WARNING: This triangle will NOT work with Kay’s mitered cross pattern as written!!!! I made my blocks by casting on a different number of stitches than she called for.
Cast on 40 sts. Knit one mitered block per pattern.
Do not cut CC yarn end off. Place stitch on holder.
With CC square down and to right, pick up 21 stitches.
Row 1: S1, Knit to end
Row 2: K to 3 sts before end, SSK, K1.
Repeat Rows 1 & 2 until 2 stitches remain.
K2tog and pull yarn through loop.
Start at the slipped stitch edge & pick up 21 sts along other MC side of mitered square.
Row 1(WS): Knit
Row 2: S1, K2tog, knit to end.
Repeat Rows 1 & 2 until 2 stitches remain.
SSK and pull yarn through loop.
Place CC stitch from holder back on needle. With attached CC yarn, pick up 41 sts along short leg of triangle.
Row 1: S1, knit to end.
Row 2: Knit to last 2 stitches, KFB, K1.
Repeat Rows 1 & 2, ending with row 1 until there are 10 garter ridges on front. Bind off.
Attach CC and pick up 52 sts along other leg of triangle.
Row 1: S1, knit to end.
Row 2: S1, KFB, knit to end.
Repeat Rows 1 & 2, ending with row 1 until there are 10 garter ridges on front.
61 stitches total.
Bind off.