Mix all the ingredients together in a medium bowl, adjusting the olive oil and mayonnaise as you'd like. Taste and add more salt and pepper as desired.
Serve the tuna salad on a bed of lettuce, in a sandwich or wrap, open faced as a tuna melt (the cheese included will melt!), or as a dip with crackers.
Notes
More vegetable options to add:
finely diced sweet peppers
grated raw beets (yummy)
chopped pepperoncini (adds nice tang)
Storage: This salad stores well in the refrigerator for up to a week.