Combine lemon juice and all spices and minced chili in a mixing bowl. Mix thoroughly with a fork to make sure they are incorporated.
Lay chicken breasts out in a single layer in a flat plastic container that would allow you to seal and turn several times. Pour marinade over breasts. Seal container and turn several times to assure that the marinade is evenly distributed over the chicken.
Store in the refrigerator for approximately 4 hours or overnight. Turn several times while in the refrigerator.
Preheat indoor or outdoor grill. Before grilling, sprinkle one more time with freshly ground black pepper. Grill for about 18 to 20 minutes over medium to medium high heat.