This one's sooo easy and delicious!
Place your skinless boneless chicken breasts in a shallow pan (like a 9" x 13" glass pan, or a square glass pan, etc.) Use a pan that is just big enough so that the chicken fills the pan, one layer deep. In a large bowl, mix together one small jar of apricot preserves, one package of dry onion soup mix, and enough (or all) of a small bottle of Russian salad dressing to make the mixture thick but easy to stir and pour. You don't want the mixture runny. Pour it all over the chicken and bake at 325-350 degrees for an hour and a half, uncovered. The marinade will be thick and gooey on the chicken and it's delicious. (If you cook this covered, it will get watery and not be nearly as good.) I just made this last weekend for an outdoor event and everyone loved it.