What I use:
1 dozen hard cooked egg yolks
1 tbsp vinegar
1 tbsp brown mustard
Mayonnaise (this is an eyeball thing, I just add until it reaches the desired consistency, I like my deviled eggs kind of firm so I don't add a lot)
1 can of ham (like the kind you'd use in ham salad) drained, and flaked
- for the onions, I take half a shot glass full of dried minced onions and fill it the rest of the way with water, leave it in the fridge for 15 mins and it reconstitutes, then you can just dump it in the mix and don't have to worry about messing up shit by chopping onions (plus i kind of like the flavor)
mix it all, stuff the hardcooked egg whites, sprinkle paprika on the tops, put the tray(s) in the fridge for a half hour, done
