plugins/products/views/blocks/products.html.erb
<%= block_title(block.title, block.subtitle) %>
<ul>
<% block.products.each do |product| %>
<li class='product'>
<%= link_to(product.name, product.url, :style => 'background-image:url(%s)' % product.default_image('minor')) %>
</li>
<% end %>
</ul>