Bird'S Nest Pie
["8 oz. spaghetti", "2 eggs, beaten", "1/3 c. grated Parmesan cheese", "1/2 c. finely chopped onion", "2 Tbsp. margarine", "8 oz. sour cream", "1 lb. bulk Italian sausage", "1 (6 oz.) can tomato paste plus 1 c. water or 2 c. spaghetti sauce", "4 oz. sliced Mozzarella cheese"]
["Break spaghetti in half; cook in boiling water until al dente. Drain.", "While spaghetti is warm, combine with eggs and Parmesan cheese.", "Press in bottom and up sides of well-greased, 10-inch pie plate."]
["spaghetti", "eggs", "Parmesan cheese", "onion", "margarine", "sour cream", "Italian sausage", "tomato paste", "Mozzarella cheese"]