Peel the avocado. Cut into small pieces, sprinkle with lemon juice, salt. Mash them with a fork.
Boil an egg. Peel off the shell. Cut in half lengthwise, remove the yolk and add it to the avocado in a bowl. Mash with a fork. Put the protein aside. Add spices. Finely chop the tomato and chili pepper.
Crumble feta cheese. Mix everything together. Add salt to taste.
Fill the halves with egg white filling, pepper, grate the cheese. Decorate with greenery.