How about something like this:
<h2>Ingredients</h2> <ul> <%- for ingredient in @ingredients -%> <li><%= ingredient.name %> <ul> <%- for supplier in ingredient.suppliers -%> <li><%= supplier.name %></li> <%- end -%> </ul> </li> <%- end -%> </ul>
Of course you will probably want to dry this up a bit using partials and include suppliers in your find statement so you are not hitting the database for each ingredient.
HTH, Nicholas