Slice the chicken breasts along the length leaving the two halves of the chicken breasts attached at the end.
Season the insides of the chicken breasts with salt and pepper
Add the kishka and onion slices to one half of the chicken breast slices.
Fold the other half of each chicken breast over the onion and kishka. Tuck any loose ends into the cavity.
Cover the chicken breasts with lettuce leaves and then place into a baking pan which should be covered with foil.
Bake for 35 minutes at 375ºF.
Uncover and top each chicken breast with 1 tablespoon of orange marmalade.
Place back into the oven and broil until the topping bubbles.
Remove the chicken breasts from the oven and let cool for 3 minutes. These can be served whole or in slices.