sub foo {
   ...
   @some_records = $c->model("DB")->resultset("MyTable")->all;
   $c->session->{data} = \@some_records;
   ...
   $c->redirect->($c->uri_for('do_something'));
}

sub do_something {
    $c->stash->{template} = 'do_something.tt2';
}

In do_something.tt2:
[% FOREACH record IN c.session.data %]
[% record.comment_field %]
[% END %]
etc.