1. Separate the avocado pulp and transfer to a bowl, add olive oil and salt.
2. finely chop the onion And green onion and add it to the avocado.
3. With canned tuna drain off the juice, add the tuna to the avocado and onions. Knead with a fork.
4. cut bread into slices, spread avocado and tuna paste on a slice of bread, and garnish with green onions.