Also known as palta a la reina, palta rellena is a classic Peruvian entrée. My version is heavier on the filling, which means it makes a decent-sized lunch.
Peel and dice potato and carrot. Steam until fully cooked, 5 to 7 minutes. Add peas and steam for 2 more minutes. Let vegetables cool down.
Shred chicken with 2 forks.
Once vegetables are cool, mix with chicken and mayonnaise. Season with salt and pepper.
Split avocado in half, remove the seed, scoop each half out of its shell with a spoon and place on top of lettuce. Stuff with the chicken mixture and serve.