Preheat oven to 375 degrees F.
In a large mixing bowl combine ground turkey, diced onion, salt, pepper, thyme leaves, parsley, panko crumbs, eggs and milk; mix until thoroughly combined and set aside.
Lightly grease a jelly roll pan or line pan with parchment paper.
Layer 8 pieces of phyllo sheets on the prepared pan, brushing each sheet with the melted butter before adding the next.
Spoon half of the turkey mixture down the center third of phyllo dough to within 1 inch of ends.
Fold up short sides to enclose filling.
Roll up jelly-roll style, starting with the long side. Repeat with remaining ingredients.
Bake for 45 minutes. Remove from oven and let stand 15 minutes.
Cut and serve.