RE: what do you do with your backstrap?
Rub whole backstrap with crushed garlic, lightly salt and pepper.
Broil whole backstrap until very rare, set aside
on ungreased cookie sheet, overlap layers of Filo dough to make a layer a bit longer than the backstrap, with a minumum of 4 layers of filo dough. Place backstrap down center of dough, cover with thawed and drained spinach leaves, sprinkle crumbled Feta cheese over spinach, working from alternate sides, fold Filo dough leaves over top of backstrap/spinach/feta until whole backstrap is covered, brushing with melted butter between leaves of dough. Bake in 350 degree oven until Filo dough is golden brown. Let rest 5 to 10 minutes before slicing and serving.