Eye of Round- at 131f for approximately 15hrs.
Would probably go a bit longer next time, but it wasn't tough. No special preparations. At the first couple of slices with a microwaved poached egg. I'd have taken a picture but the egg exploded and didn't look good.
In other news, I screwed up twice, once I somehow toggled the Anova off and it sat at a lethal temperature over night. The other, I left off the plastic wrap I normally use to trap the heat and moisture and too much water evaporated.
Double checking is now part of my process, it gets expensive wasting meat