Cut the sweet pumpkin and chicken breast into bite-sized pieces.
Steam the sweet pumpkin or cook it in the microwave.
Boil or grill the chicken breast until cooked through.
Slice the rye or whole wheat bread in half.
Place the sweet pumpkin and chicken breast on top of the bread.
Add salt, pepper, or yogurt sauce as desired.
Cover with another slice of bread to complete the sandwich.