Lemon Caper Tuna Salad Tacos

white meat tuna packed in water, drained

finely minced celery

minced red onion

heaping tablespoon capers

minced flat-leaf parsley

prepared mayonnaise

dijon mustard

freshly squeezed juice of 1 lemon

each of kosher salt and ground black pepper

corn tortillas

pea sprouts for garnish, optional