Boil potatoes with skin on, for 15 minutes, or until fork goes through easily (but potato is not mushy). Let potatoes cool for a few minutes, peel skin, then cut potatoes in small chunks.
Heat olive oil in large pan, add garlic and onions. Stir for 5 minutes, then add potatoes, seasoning with salt and pepper. Let potatoes brown a bit (5 minutes or so), then add eggs. Stir eggs in quickly and remove pan from heat once eggs are cooked. Let cool for a few minutes.
Punch down pizza dough. Roll out to 8" x 12" or so.
Spoon potato mixture on dough, spreading to within 1" on each side. Roll up dough from 12" side, jelly-roll fashion, tucking in sides. Pinch dough together to hold in ingredients. Place seam side down on parchment paper on baking pan, and bake at 375 degrees for 20 minutes.