Cut the avocados in half lengthwise and remove the pits. Scoop out a little bit of the flesh from the center to create more space for the filling.
In a mixing bowl, combine the shredded chicken and pesto sauce. Mix until the chicken is evenly coated with the pesto.
Add the halved cherry tomatoes, lemon juice, salt, and pepper to the chicken mixture. Stir gently to combine all the ingredients.
Spoon the pesto chicken mixture into the hollowed-out avocados, filling them generously.
Top each stuffed avocado half with shredded mozzarella cheese.
If desired, place the stuffed avocados under a broiler for about 2-3 minutes until the cheese melts and becomes bubbly. Keep a close eye to prevent burning.
Remove from the oven and garnish with fresh basil leaves before serving.
Notes
Serve the stuffed avocados on a bed of mixed greens for added color and texture. Drizzle with extra pesto sauce for a finishing touch.