Pit and peel the avocado, cut into cubes and mix with lime juice.
Dice the tomato.
Wash the coriander, remove the stems and roughly chop the leaves.
Peel the onion and cut into fine half-rings. Mix the half-rings with the sumac.
Spread the hummus on a large platter or small plates and top with avocado, tomatoes, sumac onions and coriander.
Garnish the Hummus Guacamole Style with sesame seeds, black cumin and olive oil and season with salt and pepper.