In a small bowl, combine the gelatin powder and water, at room temperature.
Let rest a few minutes.
Microwave for about 20 seconds, and stir with a spoon until the powder is completely dissolved.
Set aside.
In a food processor, process the avocado with the cream cheese, mayonnaise, lemon juice, Worchester sauce, salt and pepper, to taste.
Add the gelatin mix and thoroughly combine.
Pour the mousse mix into different molds.
Cover with plastic wrap and refrigerate 4 hours, or, time permitting, overnight.
Keep in the molds until you're ready to serve.
To prepare the shrimp: In a bowl, combine the shrimp with salt, pepper and garlic.
Cover and let marinade in the refrigerator for at least 1 hour.
Heat the grill or a heavy frying pan over medium heat.
If cooking on the stovetop, pour a few drops of annatto oil in a frying pan and cook the shrimp on 1 side for 2 minutes before flipping and cooking for an additional 2 minutes.
Remove from heat.
For garnish, to taste :
Arrange the shrimp around the avocado mousse on each plate.
Garnish with cherry tomatoes, sunflower sprouts and lemon wedges.
Pair with tostaditas and sprinkle olive oil over the top of everything.