Cook eggs in saucepan filled approx. 3/4 full with water, boil water and cook eggs for 12 min. Drain and let cool. Boil potatoes in large pot of water until tender (easily pierced with fork) approx. 20 min. Drain, cool, peel (if desired), and cube. While potatoes and eggs are cooling fry bacon until crisp, let cool and crumble. Chop celery and green onion and place in large bowl. Grate eggs into bowl with cheese grater, add cubed potatoes and bacon. Mix mayonnaise, sour cream, relish and yellow mustard add to potato salad mixture, mix well. Salt and pepper to taste.