In a large saucepan, combine the broccoli, contents of the couscous seasoning packet, water and 1 teaspoon oil. Bring to a boil. Stir in couscous. Cover and remove from the heat; let stand for 5 minutes., Meanwhile, flatten chicken to 1/4-in. thickness. Sprinkle with salt and pepper. Combine the lemon juice, garlic and oregano; rub over chicken. In a large skillet, brown chicken in remaining oil over medium heat for 8-10 minutes or until juices run clear. Stir tomato into the couscous; serve with chicken.