Dice the roma tomatoes.
Mince garlic. Chop basil.
In a bowl, mix together tomato, garlic, basil, olive oil, salt, and balsamic vinegar.
Refrigerate.
Saute' Chicken breast with salt and pepper. Dice once cooled. (Or use leftover chicken)
Cut avocado in half and remove seeds.
Scoop chicken and cold bruschetta into the avocado.