Heat the oil in a large skillet with a tight-fitting lid over medium heat. Add chicken and cook till browned on both sides, about 5 minutes.
Add next 5 ingredients (onion through black pepper). Reduce heat, cover and simmer for 10 minutes or until chicken is cooked through.
Arrange 1 cup of raw chopped spinach on each dinner plate and top with a chicken breast half (the heat of the chicken will wilt the spinach perfectly). Serve hot and enjoy!!!