German twisted CO über doppelte Nadeln.
Sweet tomato heel: https://youtu.be/IRc3309JUyc?si=2w8dzAh75ydf5B2n. This is a nice heel, but not suitable for colourwork, because you have to knit full rows between the wedges, so you have to cut your yarn.
I didn’t divide the work in 3 parts, but only in 2. So I knitted 6 pairs of stitches on both sides, leaving 8 stitches in the middle, before starting the wedge. Repeated this 2 times more.
Will surely use this method another time.