Let's cook.
In a small bowl, combine the mayonnaise, aji amarillo paste, lime juice, salt, and black pepper. Mix well until smooth to create the aji amarillo mayonnaise.
Slice the crusty rolls horizontally, but not all the way through, creating a pocket for the filling.
Spread a generous amount of the aji amarillo mayonnaise on the inside of both halves of each roll.
Divide the shredded chicken evenly among the four rolls, placing it on the bottom half.
Arrange the sliced avocado over the shredded chicken in each roll.
Close the sandwiches and serve immediately.
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