I just had a variation of that with Canadian bacon instead of tuna. Sourdough bread, sharp habanero cheddar, and Sriracha. How can something so simple be so good??
I heard a pretty ballin' recipe where you mix tuna with spices like that, throw some cheese over the top, and throw open-faced sandwiches under the broiler for a gooey melty cheese tuna melt.
Dying to try it:
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But I feel like adding sriracha would be totally worth it. That or Vietnamese fish sauce.