Bring 1 1/2 quarts or 1.5 liters water to a boil. Add salt
Add shrimp to the boiling water. Boil shrimp for 1 1/2 to 2 minutes until shrimp are firm when touched with a spoon. Transfer to an ice bath to cool.
Add Clamato juice and ketchup to a mixing bowl and mix thoroughly
Add hot sauce, chopped avocado, onion, celery, cucumber, cilantro and tomato. Mix thoroughly
Add the shrimp and gently mix until just combined
Spoon into large lowball/rocks glasses by alternating shrimp and sauce until you have 3 shrimp in each glass and the glasses are full.
Squeeze lime onto the top of each glass.
Fan the avocado slices and gently place the fanned slices on top of each glass.
Notes
We like to use Valentina hot sauce but you can use your favorite hot sauce instead. Be aware that the amount of heat may vary in each sauce. Flavor to taste
Slice the avocado garnish just before serving to avoid oxidation.
Cocktails can be stored by placing plastic wrap directly over each cocktail with the plastic wrap in direct contact with the avocado slices in order to avoid oxidation.