This is my favorite way to work the 1/1 RC twist without a cable needle. First move both stitches to the RH needle and then switch their positions. It's a little fiddly but it works for me!
by oana's crochet channel
by NotikaLand crochet and knitting
by Loom Knitting with Joanna
by Technology Teach Gear
by Edinir- Croche
by Aishi Jewellery 1 Gram Gold