Yes, a vegetable pasta salad would probably use olive oil ... or you can get lazy and use a bottled Italian type salad dressing. I don't know where you live, but when shopping for the fresh vegetables, if one doesn't look great, try another. For example if the zucchini looks bad, try crookneck. If the brocolli looks bad, look for cauliflower.
If I'm using boneless, skinless chicken breasts I prefer to cook them in a skillet that has a lid to the oven. Season, brown both sides, then put the lid on and, since I have an electric stove, I turn the burner off. The chicken is cooked by the time I prepare the rest of the meal (the residual heat from the burner and the heavy-bottomed skillet finish the job). One investment that is well worth the expense is a meat thermometer. People tend to overcook chicken and pork in the name of safety. So buy a thermometer and end all doubt. There is no reason to spend your life eating dried out meat.