Cut the chicken breast into bite-sized pieces.
Prepare corn kernels.
Finely chop the onion and tomato.
Add olive oil to a pan and heat over medium heat.
Add the chicken breast, season with salt and pepper, and cook thoroughly.
When the chicken is cooked, add corn, onion, and tomato, and stir-fry for 2 minutes.
Place the stir-fried ingredients on a tortilla.
Top with lime juice, cilantro, and yogurt sauce to taste.