Pat chicken breasts dry with paper towels. Trim visible fat and tendons.
Slice chicken into 1/2-inch strips, then cut crosswise into 1/2-inch cubes. Transfer to medium bowl.
Combine all dry seasonings in small bowl. Drizzle olive oil over diced chicken, then sprinkle with seasoning mixture.
Toss thoroughly to ensure even distribution. Allow to rest 10 minutes for flavor absorption.
Heat skillet over medium-high heat until oil shimmers. Add chicken in single layer (work in batches if necessary).
Cook undisturbed for 3-4 minutes, then stir once and continue cooking 2-3 minutes until internal temperature reaches 165°F.
Remove from heat and transfer to clean plate or sheet pan. Allow to cool at room temperature for 20-30 minutes.
Divide chicken into 5 equal portions and place into airtight containers. Refrigerate portions intended for use within 4 days, freeze remaining portions.