2 pounds boneless, skinless chicken breasts or thighs, cut into bite-size pieces
3 medium-size onions, minced or pureed in food processor
2 cloves garlic, minced
1 cup water
1 tsp cayenne pepper or red pepper flakes (optional)
½ tsp black pepper
1 green bell pepper, seeded and diced
2 ripe tomatoes, diced