Cook potatoes in boiling water until tender, about 15 minutes; drain and place in a bowl.
In a skillet, saute onion in butter until tender; add to potatoes. On low speed, beat in eggs, one at a time, until smooth. Beat in cream (the mixture will be thin).
Add the ground almonds, salt and nutmeg.
Spoon into a greased 1-1/2-qt. baking dish.
Sprinkle with cheese and almonds.
Bake, uncovered, at 400° for 20 minutes or until heated through.