To a large skillet, add the oil, chicken, red pepper, and cook over medium-high heat for about 5 to 7 minutes, or until chicken is cooked through; stir and flip intermittently so the chicken cooks evenly.
Add the salsa, black beans, cumin, pepper, optional salt (some salsas are very salty already and you can omit), and stir to combine. Allow mixture to simmer for about 3 minutes, or until warmed through.
Evenly sprinkle the green onions, cilantro, optional avocado and/or cheese, and serve immediately.
