Put this in after that second forward fold (the first frame of the second line in the image above) like this:
Forward fold. Inhale step back into your lunge. Exhale stay there. Inhale to prepare and then exhale to step that foot back to forward fold. Continue as above until you find yourself back in Tadasana. Then repeat taking the other leg back next time around.
You could also hold that lunge for a few breaths if it feels good just to be there.
Want to throw in something else? How about a twist? Or stepping back into a Downward Facing Dog after the lunge? Or dropping the back knee and taking the arms up to the sky from the lunge?
The possibilities are endless!
So set your timer and go see where this takes you! And DON'T FORGET to give yourself a little Shavasana at the end!
Let us know how it went in the comments. :-)