In a large frying pan, add oil and heat over medium heat (after potatoes are peeled).
Peel and thinly slice potatoes into small thin cubes, add to pan.
Remove sausage from casing and cut lengthwise, then cut into small pieces, add to pan.
Sprinkle with pepper and garlic salt.
Cook over medium heat stirring occasionally until potatoes are soft and sausage is thoroughly cooked.
Add eggs and milk to a medium bowl, whisk until blended and add to sausage mixture.
Stir to mix and then cook eggs until scrambled to desired consistently.
Turn off heat, add cheese to melt then top with sliced green onions.
In another frying pan, heat oil over low/medium flame.
Heat up each tortilla on the stove over low flame and then spoon scrambled egg/sausage mixture to the middle of each one, roll up and place into the hot oil.
Fry until golden brown on both sides.
Remove from pan and place on plate lined with paper towels.
Let cool for a few minutes then enjoy!