Whisk one egg with pepper in a large bowl until well blended. Add thawed potatoes and 1/2 cup Cheddar cheese. Mix well until potatoes soak up the egg.
Spoon about 1 cup of potato mixture around center of waffle grid. Carefully and quickly even out the mixture. It does not need to go to the edges. Close lid and flip. Cook 12 - 15 minutes, depending on thickness of potatoes. Do not open waffle maker to check!
When done, lift waffle off grid, carefully, with fork. Repeat with remaining potato mixture.
Meanwhile whisk milk, 1 tablespoon chives and remaining eggs until blended. Add to medium skillet, set to medium heat and cook 5 - 10 minutes or until eggs are set, stirring frequently.
To serve: Place hash brown waffle on plate, top with 2 slices of cooked bacon, 1/4 of eggs, sprinkle each plate with 1/4 of the cheese. Sprinkle with remaining chive.s