Mix together all the dry ingredients in a large bowl. Add the lemon zest, garlic, crawfish, parsley and hot sauce. Mix gently to combine. Add the water or stock slowly until a loose dough is formed. Set aside for 15 minutes.
In a deep-fryer or heavy-bottomed pot, heat enough canola or peanut oil to come halfway up the sides of the pot, to 350 degrees F.
Spoon 1 heaping teaspoon dough into hot oil and cook in batches until deep golden brown, about 3 to 4 minutes. Remove from the oil and drain on paper towels. Sprinkle with salt while still hot. Let temperature of oil return to 350 degrees F between batches.
Whisk the mayonnaise, mustard, horseradish, lemon juice, salt, pepper and cayenne together in a medium bowl until well blended. Stir in the parsley, capers and green onions and mix well. Refrigerate until ready to use.
Transfer the beignets to a serving platter and serve with the remoulade sauce.
A viewer or guest of the show, who may not be a professional cook, provided this recipe. It has not been tested for home use.