Finely chop the onion, garlic, chilies serranos, and coriander leaves. Place in bowl and add lime juiceand salt, set aside. Peel and pit the avocados and place in a bowl. Mash with fork slowly adding the tablespoon of pomegranate juice. Add onion and garlic mixture and fold together to make a course pulp. Gently fold in pomegranate seeds.