Difficulty: Medium
As a seasoned chef with years of fine dining experience, I recommend starting by softening the gelatin sheets in cold water. Bring the milk to a boil. In a large saucepan, whisk the egg yolks with salt and pepper. Gradually pour the hot milk over the yolks while whisking constantly on low heat, ensuring it doesn't boil.
Squeeze excess water from the gelatin and stir it into the milk-egg mixture until fully dissolved. Mix well and allow to cool.
Meanwhile, cook the crab claws by immersing them in boiling salted water for 10 minutes after the water resumes boiling. Drain, shell the claws, and reserve the tip of each claw for garnish.
Peel the avocados and mash the pulp. Set aside 2 avocados for decoration. Purée the remaining 4 avocados with salt, pepper, and a few drops of Tabasco. Fold this avocado purée into the cooled egg cream.
Lightly brush 6 ramekins with olive oil. Layer each with avocado cream at the bottom, followed by crumbled crab meat, and top with more avocado cream. Cover with plastic wrap and refrigerate for 3 hours.
To serve, unmold each terrine onto a plate lined with lamb's lettuce and reserved avocado slices. Place the reserved claw tips on top for an authentic touch.

Chef Hubert's Tip: This terrine showcases fresh seafood and ripe avocados in perfect harmony, ideal for elegant starters.