Sausage Stuffed Potato Dumplings



14 ounces turkey or pork sausage, removed from it’s casing
1 small or ½ medium onion, finely chopped
1 teaspoon dried sage
1 teaspoon fennel seeds
3 large potatoes about 14 ounces each, cooked, peeled, mashed and allowed to cool * see note
½ teaspoon salt
¼ teaspoon pepper
1 egg
1 tablespoon flour
Vegetable oil