If using roasted chicken breast, remove from packaging and microwave until warm, 1-2 minutes. Add to salad and combine.
If using sirloin steaks, pat dry, and season both sides with a pinch of salt and pepper. Place a medium non-stick pan over medium heat and add 2 tsp. olive oil. Cook until steaks reach a minimum internal temperature of 145 degrees, 5-7 minutes per side. Add to salad as desired.