In large stockpot, add chopped potatoes and fill with just enough water to cover potatoes.
Bring water to boil over medium-high heat and boil for 8-10 minutes, or until potatoes are soft enough to pierce with fork.
Drain potatoes and place back on burner. Turn down heat to low and cover for 15 minutes.
Attach upper and lower waffle plates and preheat Grill & Broil to 425°F.
In large bowl, mash potatoes with hand masher until smooth.
Mix in remaining ingredients until combined. Add additional milk if mixture seems too thick.
Scoop ½ cup of mixture into center of each waffle plate. Close lid and cook for 7-8 minutes, or until waffles are crisp.
Remove waffles and place on wire rack to cool. Repeat with remaining mixture.