Berry intestines
(Third recipe on the page.)
To make it more disturbing looking, you could do a chocolate-cherry filling. Here is another recipe, with a less interesting chocolate filling, but better assembly instructions.
Kind of fussy, rolling all that puff pastry into tubes, but still cool. The golden-brown flaky intestines are delightful looking. (Super easy version just uses canned biscuit dough, topped with cherry pie filling.) Bonus points for a more anatomically correct arrangement.
For puff pastry with a chocolate-cherry filling, here is what I’d do: Pour off most of the cherry syrup, and mix the remaining cherries with a similar amount of chocolate sauce. Mix powdered cocoa into the cream cheese before spreading. After assembly, drizzle with the reserved cherry syrup.
Puff pastry around a meat filling , or other fillings, would also be good, but chocolate cherry is my favorite.