In a medium bowl, stir together the tuna, egg, bread crumbs, mayonnaise, lemon juice, lemon zest, parsley, salt and pepper until combined.

Divide the mixture into 4 equal portions and shape into patties. *Hint: If patties are not holding their shape, form balls, flatten and chill in refrigerator for 15 minutes or freezer for 5 minutes. 

Heat the olive oil in a large skillet over medium high heat.

Add the patties to the pan and cook for 2-3 minutes or until golden brown. Flip the patties over and cook for an additional 2-3 minutes.

Serve with tartar sauce and/or lemon wedges, if desired.