- In a bowl, combine the tuna, eggs, onions, mayonnaise, oil, and lemon zest and juice. Season with salt and pepper.
- Place the tortillas on a work surface. Cover with tuna salad. Top with tomatoes, cucumber, peppers and basil. Fold the right side of the tortilla up diagonally and roll up firmly. Wrap individually in parchment paper, twisting each end closed. Cut in half, if desired.