# The CGI::Application::Plugin::TT configuration __PACKAGE__->tt_config( TEMPLATE_OPTIONS => { INCLUDE_PATH => '/path/to/templates', WRAPPER => 'wrapper.tmpl', PRE_CHOMP => 2, POST_CHOMP => 2, }, ); # wrapper.tmpl [% WRAPPER html.tmpl + layout.tmpl; content; END; %] # layout.tmpl

[% content %]

# html.tmpl is just a simple wrapper, nothing relevant to my issue ##

##

__PACKAGE__->tt_config(
    TEMPLATE_OPTIONS => {
        # same as above, plus:
        CONSTANTS       => {
            menu    => [
                { text => 'Foo',
                  link => 'foo.html', },
                { text => 'Bar',
                  link => 'Bar.html', },
            ],
            foo     => 'foo!',
        },
    },
);

# main_menu.tmpl

    [% constants.foo %]
[% FOREACH constants.menu %]
    [% text %]
[% END %]


##

##

__PACKAGE__->tt_config(
    TEMPLATE_OPTIONS => {
        # same as the original one, plus:
        PRE_PROCESS     => 'config.tmpl',
    },
);

# config.tmpl, in case I have to define more site-wide parameters in the future
[% PROCESS menu_def.tmpl %]

# menu_def.tmpl
[% site.menu = [
    { text => 'Foo',
      link => 'foo.html', },
    { text => 'Bar',
      link => 'Bar.html', },
    ];
%]

# main_menu.tmpl obviously becomes

[% FOREACH site.menu %]
    [% text %]
[% END %]