Cut the avocados all the way around the stone. Twist the two halves apart. Remove the stone, scoop the flesh out of the skin with a spoon and cut the flesh into cubes. Reserve the skins.
Mix the avocado in a bowl with the chicken and the pesto.
Slice the tomato.
Fill the 4 avocado skins with the chicken-pesto salad. Garnish with a salad leaf and some tomato slices.
Garnish tip: Add an elegant touch by garnishing the dish with an EAT ME edible flower.