What TF is tuna spread? We always called it tuna salad, even though it's not really a salad.
The traditional recipe I know calls for mayonnaise, mustard, and relish. I do not use relish. However, I've been known to add minced garlic, Tabasco sauce, and shredded cheese. Sometimes, chopped olives. If you don't use mustard, you can also use BBQ sauce.
Egg salad is messier by far, and I have an egg guillotine. The kind you put a hard-boiled egg in and it slices it. Then you carefully turn it and repeat. Once it's sliced two ways, I've never been able to get the third dimension, I just push it through to the bowl like that. So I get long pieces, but there are ways to 3D slice it (patience? skill? Yeah, probably a skill issue).
Tuna salad is not that messy. I've also been known to eat it without bread. It's very high in protein, and cheese adds more. Screw those nasty ass snot-consistency protein drinks, I'd rather eat tuna out of a small container. I'd LOVE to get a CLEAN can of cat food and put it in there, and walk around looking like I'm eating cat food like a mad lad (it kinda looks/smells like cat food). Like the old "put vanilla pudding in a mayonnaise jar and walk around eating it to look crazy" thing I've never actually seen anyone do.