Thanks, "My guess" for your reply.
I will try adding some spring onion and apple as suggested by you. May be, I can also try adding some red cabbage and bits of red pepper to make the salad look more colorful, what do you think?
How many bottles of mayonnaise (Kraft size) should I buy? Will two bottles be enough? I do not normally use mayonnaise my cooking, so I will like to avoid having remaining amounts in my fridge.