How To Make Tuna stuffed deviled eggs:
Place eggs in a saucepan; cover with water. Bring to a boil, remove from heat, and let eggs stand in hot water for 15 minutes. Remove eggs from hot water, cool under cold running water, and peel.
Cut eggs in half lengthwise; place yolks in a small bowl. Mash egg yolks with a fork; stir in tuna, pickle relish, mustard, sugar, and onion powder. Stir mayonnaise into tuna mixture until mixture is creamy but remains firm; season with salt and pepper.
Place egg whites cut-side-up on a serving platter. Spoon tuna mixture into egg white halves; sprinkle with paprika.
Notes:
Slice a small sliver off bottom of egg whites to allow them to sit flat if you like.
Optional add-ins or substitutions include dill pickle relish, chopped onion, dill, curry, Dijon mustard, garlic, chopped tomato, chopped pimento.