The tuna you get from Spain changes this. Packed in olive oil, properly seasoned, firm but not dry โ it's a different ingredient from regular tinned tuna. The trinity here is tahini + mayo (Kewpie) + miso in roughly equal parts, adjusted to mood. Still in experimentation phase on ratios โ somewhere between ยฝ and 1 tbsp each is the zone. Sumac and aleppo in quantities that would concern a normal person. Fresh lemon. Some of the oil from the can but not all.
Good on sourdough as a proper open-face sandwich. Also excellent on Mary's crackers as a smash/dip situation.
Drain most of the oil from the can into a bowl โ keep a glug back. Add tuna. Add tahini, mayo, and miso โ start at ยฝ tbsp each, taste, adjust. You want it cohesive and creamy but still with some texture. Don't overwork it into paste. Squeeze lemon over. Hit with a serious amount of sumac and aleppo. Mix. Taste. Add more sumac. More aleppo. You're probably still not there. Add more.
Sandwich version: Toast the sourdough. Lay arugula/spinach on one slice. Pile tuna smash on top. Open face โ don't close it, it doesn't need it.
Cracker version: Mary's crackers flat on a board. Spoon tuna smash generously onto each. Eat immediately before they go soft.
Either way: extra squeeze of lemon at the end, pinch more sumac, done.
Estimated from the ingredients โ amounts and serving size vary, so treat it as a ballpark.