1Heat oven to 375°F. Spray 12 regular-size muffin cups with cooking spray.
2Make potatoes as directed on box except omit butter and milk. Stir in salsa and eggs. Divide mixture evenly among muffin cups, about 1/3 cup each.
3Bake 25 to 30 minutes or until tops are golden brown. Cool 5 minutes; carefully remove from muffin cups. Top cupcakes with yogurt; sprinkle with onions.