Heat oil in a skillet. Salt and pepper the chicken. Cook chicken for about 7 minutes. Flip and add onionis and garlic. When chicken is cooked through and the onions are slightly softened, remove chicken from skillet and cut into large chunks.
Add the chicken back in the skillet. Add thyme, mint, oregano, and tomatoes. Stir. Add olives and beans. Stir. Simmer until heated through.