Chop the onion

• Finely chop the red onion.

Mix the patty mixture

• In a bowl, combine the red onion, canned tuna, egg and breadcrumbs.
• Add the basil, mayonnaise, black pepper, garlic powder, chili flakes and salt.
• Mix well and adjust the consistency so the mixture holds together.

Fry the patties

• Shape the mixture into patties.
• Heat a touch of olive oil in a pan over medium heat.
• Fry the patties until golden brown on both sides.

Drain and serve

• Drain the patties on a paper towel and let them cool slightly.
• Serve on their own or in sliders.