First in a bowl , add ripe avacado . Mash it well with the help of fork .
Now add chopped onion , chopped tomatoes , coriander leaves , lemon juice ,salt and black pepper powder to the mashed avacado .Mix all ingredients well .Guacamole is ready.
Now take brown bread piece ,Spread 2 tsp guacamole on it. put anothe bread pieces on it . Repeat this process with remaining bread pieces .
Now add 1 tsp oil ,then add some cumin seeds , when seeds starts crackle . Put guacamole bread pieces on it . Cook from both sides . Guacamole sandwich is ready to serve .