Preheat oven to 425°F. Liberally oil 6 ramekins and place on baking sheet. Place the pan of cups in the oven to heat. Place eggs, onion, salt, and pepper in blender. Blend and pour into a large bowl. Process potatoes in food processor so that they are just diced. Add egg mixture and 3/4 cup oil. Mix well until potatoes are finely diced. Place mixture evenly in heated ramekins. Bake at 425°F for 1 hour and 15 minutes or until cooked though and browned on top.