In a large saute pan, heat 1 tablespoon of olive oil over medium heat. Add onions, bell peppers and garlic. Cook until tender and lightly brown, about 4-5 minutes. Remove peppers and onions from pan and set aside. Add remaining olive oil, chicken and spices to the pan. Saute the chicken until it's lightly browned. Add the vegetables and pineapple chunks, and saute for 3 minutes or until heated through. Serve immediately over rice.