<p>
  Add the <span class="ingredient">basil</span>, <span class="ingredient">pine nuts</span> and
  <span class="ingredient">garlic</span> to a blender and blend into a paste.
</p>

<p>Gradually add the <span class="ingredient">olive oil</span> while running the blender slowly.</p>

span.ingredient {
  color: #f00;
}