1. Heat 1 tablespoon oil in a large skillet over medium-high heat. Add the peppers and cook, stirring occasionally, until just tender, about 4 minutes.

2. Add the remaining tablespoon oil, then the chicken. Cook, stirring occasionally, until the chicken just loses its pink color, about 2 minutes. Add the teriyaki sauce and continue cooking, stirring, until the chicken is well-coated and cooked through, about 2 more minutes.

3. Divide the mixture among the tortillas and serve.