I found what I was looking for.
var chfield = t.find('#today-channel').value,
Meteor.call('todayUpsert',
Today.findOne({channel: chfield}, function(err, result){
if (result) {
return result._id;
}
if (!result) {
return null;
}
}),
{
channel: chfield,
admin: Meteor.userId(),
date: new Date()
}
);