TIL, the Mojolicious tag helper can be nested. This

<ul class="navigation">
%= tag 'li', tag 'a', href => "#$_", $_ foreach qw/foo bar baz/
</ul>

becomes

<ul class="navigation">
  <li>
    <a href="#foo">foo</a>
  </li>
  <li>
    <a href="#bar">bar</a>
  </li>
  <li>
    <a href="#baz">baz</a>
  </li>
</ul>