Proper way to read checkbox data in NodeJS

I have a form on my webpage and its being submitted to a NodeJS backend.'

I'm having trouble with the checkboxes. When the are submitted to server, and I read them via req.body.foods, I get something like ['on', 'on', 'on'].

But I want to get the actual values, that is, something like ['dairy', 'fish'] etc.

How can I do that?

                                <div class="col-sm-6">
                                    <div class="checkbox">
                                        <label><input name="food" type="checkbox" value="dairy">Dairy</label>
                                    </div>
                                    <div class="checkbox">
                                        <label><input name="food" type="checkbox" value="meat">Meat</label>
                                    </div>
                                    <div class="checkbox">
                                        <label><input name="food" type="checkbox" value="fish">Fish</label>
                                    </div>
                                </div>