Cut potatoes into small cubes.
Slice peppers and onions thinly.
Heat oil in large skillet.
Add potatoes first, cook 8 minutes.
Add peppers and onions next.
Season with salt and pepper.
Cook vegetables until golden brown.
Boil hot dogs in separate pan.
Cook for 6-8 minutes total.
Slice rolls lengthwise, don't cut through.
Warm rolls in oven briefly.
Place hot dog in each roll.
Top with vegetable mixture generously.
Serve immediately while hot.