Sardines from 1 can minus oil, this is just what I had on hand.
Remove backbone if you dislike them. Place in a cereal/soup bowl
Finally dice your onion, add to bowl with sardines
Add garlic powder, I give it a couple sprinkles, maybe half a teaspoon.
Add hot sauce (here I used crushed red pepper) and a grind or two of black pepper
Using a fork, mash it all together, breaking up everything
When it's mashed to your liking, add mayonnaise
Mix and mash the mayonnaise, until it's sort of smooth
Serve. I happen to like it open face, a nice crusty bread is good, I only had Italian bread. I garnished it with a bit of chives (green onion, cilantro, parsley all work, or nothing at all) and enjoy. Makes two sandwiches.
NOTES - Sometimes I put horseradish on the bread, sometimes I toast the bread. This also lends itself to modifications for the way you like it. My dad never used hot sauce, I happen to like a little heat.