Mashed Potatoes
1-Boil potatoes in salted water until fork: Boil potatoes in salted water until fork tender, then drain. Mash potatoes into a large bowl. Add butter and milk, mix. Season to taste with salt and pepper. Potatoes should be fairly stiff so they can hold their shape
2-Stir in beaten yolks: Stir in beaten yolks. Cool or refrigerate potatoes. These should be stiffer than regular mashed potatoes. They can be made a day before.

Picadillo
3-Heat olive oil in large sauté pan: Heat olive oil in large sauté pan over medium heat. Add onions and cook a few minutes until translucent. Next, add garlic, continuing to stir until garlic is fragrant, about 1 minute.
4-Add ground beef stirring to break up: Add ground beef stirring to break up meat.
5-Add paprika, cumin, cayenne, salt and pepper: Add paprika, cumin, cayenne, salt and pepper. Cook until beef is brown throughout. Add chopped olives and juice. Stir and adjust seasoning to taste, adding more if necessary.

Breading
6-Mix 1/4 cup all purpose flour and: Mix 1/4 cup all purpose flour and 1 cup bread crumbs in a shallow bowl.
7-Beat the 2 egg whites and 1: Beat the 2 egg whites and 1 egg and place in a bowl.

Assembling the Papas Rellenas
8-Using about 1/4 cup stiff, cold mashed: Using about 1/4 cup stiff, cold mashed potatoes, form into a ball.
9-Flatten ball and make a hollow: Flatten ball and make a hollow.
10-Put about 1 tablespoon picadillo inside indentation: Put about 1 tablespoon picadillo inside indentation.
11-Enclose meat in potatoes, forming into a: Enclose meat in potatoes, forming into a ball. Place on baking sheet.
12-Repeat with remaining potatoes and meat: Repeat with remaining potatoes and meat.
13-Roll each ball in egg mixture then: Roll each ball in egg mixture then in breading. Place on baking sheet. Chill 2 to 4 hours.
14-Heat oil in a deep-fat fryer or: Heat oil in a deep-fat fryer or deep frying pan. I used a deep frying pan and about 1 1/2 inches of oil. When oil is hot, carefully place 2 or 3 balls in pan, using a slotted spoon and turn until golden brown on all sides, 2 or 3 minutes. Transfer to clean baking sheet lined with paper towels.
15-Hold in warm oven until all papas: Hold in warm oven until all papas are fried. Makes approximately 2 dozen, depending on the size.