Force Apache directory listing even if DirectoryIndex files are present

How can I configure Apache to list files in a directory even if an index file is present?

For example, if I have a directory /var/foo that contains a number of files, and one of those is a directory index (index.html, index.php, etc.), how can I make Apache show the directory listing instead of displaying the contents of index.html, when a user browses to http://example.com/foo/?

# Directory listing for /var/foo/, mapped to http://example.com/foo/
..
.
code.c
readme.pdf
index.html

I have used the following but I would imagine there's a better way:

Options +Indexes +MultiViews
DirectoryIndex will-never-exist.xyz