$ cat recurse.tt2
[% BLOCK recurse %]
[% META name = 'my file' -%]
recursion count: [% counter %]
[% counter = counter + 1 -%]
[% RETURN IF counter > 3 -%]
[% PROCESS recurse %]
[% END %]

[% PROCESS recurse counter = 1 %]
    [% FOREACH variable IN [ 6, 7, 9 ] %]
       The variable is set to [% variable %]
    [% END %]