First boil the egg then let it cool. Then peel it and chopped into small pieces. Peel avocados and mashed in a bowl. Now mix mashed avocado and chopped eggs. Add salt and pepper.
Take one slice of wheat bread spread lettuce leaves on it then add avocado and egg mixture. In another slice of bread smear 1 tbsp of mayonese then place it over on other bread slice.
Now cut it crosswise with a bread knife and enjoy freshly made avocado egg sandwich.