this isn't really Deviled Ham, but I put cold cut ham in the fp, onion, first, cuz it needs less time, then the ham, and take that out and in the bowl of ham & onion I add Mayonaise, sweet pickle relish, and pepper. Needs no salt because of the ham. Sometimes I add cayenne, and/or siriacha, and one time Sushi ginger & wasabi(that was really good, but I love sushi flavors).. You could add sour cream with or in place of mayo. your call.
I eat low carb too. and put the ham salad on lettuce leaves, baby romaine leaves make it like a 'sammich'. Love those leaves for any kind of 'sammich'..
Nan in De.