On the rear hook, tie in a sparse marabou or zonker tail off the bend about 1.5 shank lengths long, with a few strands of flash down each side.
Dub a slim Ice Dub body forward, then wind a schlappen feather as a soft collar 2-3 turns; whip finish the rear hook. Use half the material you think.
On the front hook, lash a length of braided wire down the shank, thread on 2-3 beads, loop back through the rear hook eye and bind the tags so the rear hook rides about a gap-width behind. The beads form the flexible joint.
Bind the dumbbell eyes on top of the shank one eye-length back from the front hook eye with tight figure-8 wraps; mounted on top they flip the fly to ride point-up.
Behind the eyes wrap 3-4 turns of polar chenille, then tie a pair of barred sili legs along each side, splayed outward.
In front of the eyes stack a wad of Laser Dub top and bottom as an underbody, then spin and pack 2-3 clumps of deer belly hair for the head, packing each clump tight before adding the next.
Whip finish at the eye and cement, then trim the deer hair to a broad flat wedge (wide and blocky up top, tapered underneath) so the fly pushes water and slides.
Other versions
3 more in the app: Fly Fish Food Tie, variant 1, Fly Fish Food Tie, variant 2, Mini.