watching..I have frozen walleye too. Hope High on Smoke shows up.
I checked my forum site for SV and none of them has done it from frozen. Their suggestion: I would give 130°f 15min bath.. longer if over 1in thick, season after, finish skin side down in a skillet with a knob of butter, spooning the butter over the top. Pam .☆´¯`•.¸¸. ི♥ྀ.