Season the tuna with salt and pepper.
Sear in a saute pan with 1 tsp oil for 10 seconds on each side, chill.
When ready dice the tuna and mix with the other ingredients and assemble by arranging half of the mixture in the center of the tortilla.
Fold in the 2 sides a few inches and roll the tortilla forward to enclose mixture, secure with two toothpicks.
Cut in half.