Using a medium bowl, put the crab meat inside and use your hands to pick the meat free of any shells; do this at least twice
In another medium bowl, whisk the eggs until they are light and foamy; then whisk in the mayonnaise and mustard.
Use a spoon to stir in the lemon juice, scallions, red onion, salt, black pepper and cayenne.
Fold in the Panko; gently fold in the crab meat so it doesn't get broken up from too much mixing.
The batter should be just thick enough to barely hold together when frying.
Cover and place in the refrigerate for at least 1 hour to help it firm up further.
In a large, deep skillet or pot, heat 2 inches of canola oil to 350° F.
Using 2 medium-sized spoons, drop a few spoonfuls of the crab mixture at a time into the oil and fry until a nice golden brown color forms on the outside; 1 to 2 minutes.
Use a slotted spoon to transfer the bites to a plate lined with paper towels.
Repeat with the remaining batter, frying in batches so as not to crowd the pan.
Keep the cooked bites warm in a 200° F oven, if desired.
Best served with White Remoulade Sauce.