Hollandaise: Place egg yolks, lemon juice, salt, and cayenne pepper in a blender, and process on low for 15 seconds. Melt the butter in a small saucepan until it is sizzling hot.
Remove the small clear insert in the top of the blender. With the blender on low, slowly add the hot butter to the egg and lemon mixture, and blend for 30 seconds, until the sauce is very thick.
Crawfish Tails: Melt the butter in a saucepan; add shallots, and sauté.
Add salt, crab boil, white wine, crawfish tails, and heat through.
Remove from heat, and add parsley.
Soak bread in custard.
Heat olive oil and butter in a skillet over medium-high heat.
Add bread and sear on each side.
Remove from skillet.
Add 1 quart water and vinegar to a stockpot. Bring to a light simmer.
Gently crack eggs into water, and cook for 3 to 4 minutes,. or to desired doneness.
Remove eggs using a slotted spoon and let drain on a clean kitchen towel to remove excess water.
Gently place poached egg on French toast. Top with sautéed crawfish tails and hollandaise. ENJOY!
Recipe by Louisiana Cookin' at https://louisianacookin.com/savory-louisiana-crawfish-french-toast/