Preheat oven to 350 degrees Fahrenheit.
Heat oil in a large skillet over medium-high heat. Add veal, breaking it up with a wooden spoon; then onions, salt, pepper, and garlic powder; sauté until meat is browned.
Stir in bread crumbs, egg, and spinach; remove from heat.
Roll out one pastry sheet on a lightly floured surface. Spread half of meat mixture on pastry, leaving a 1/2-inch border on all sides. Roll up jelly roll style. Repeat with remaining ingredients.
Place each roll, seam-side down, into a lightly greased baking dish. Brush with yolk and sprinkle with sesame seeds.
Bake for 45 minutes to one hour or until veal is cooked through and pastry is golden brown.
Photo by Sara Goldstein. Reprinted from The Kosher Palette with permission from the copyright holder, ArtScroll/Mesorah. Buy it on Amazon.
Can you use ground turkey
yes