Microwave potatoes for about 10 minutes to soften.
In a large bowl combine eggs and milk. Whisk together until well combined.
Place 1 tablespoon olive oil in a large skillet and add potatoes. Saute until potatoes are tender (add additional olive oil or water if needed).
Remove potatoes from skillet and place into a bowl.
Add 1 tablespoon of olive oil to skillet and add chopped onion and red pepper. Saute until tender.
Add peppers and onions to potatoes.
Once vegetable have cooled slightly, add them to egg mixture.
Add 1 tablespoon of olive oil to a 10-inch skillet or pan. Add egg and vegetable mix to skillet and cook over low heat until most of the eggs are set (about 10 minutes).
Place a plate over top of the skillet and turn plate over so tortilla is on the plate.
Flip tortilla and place carefully back in skillet. Cook for another 5 minutes or until eggs are completely cooked.