Yes, there are ... tomatoes.
some
... we eat the rolls with cheese?
Shall
... some soup?
How about
about / How / onions / some / ?
How about some onions?
Are there any rolls in your bag?
No, there aren't any rolls.
Are there ... tomatoes?
any
No, there aren't ... cheese.
any
Is there ... milk?
any
Shall we ...?
make some tea