Instructions

1. 1
   Mix spices into beef, using hands, until well-mixed.
2. 2
   Form 8 small balls of meat, then press into very flat pancake shapes.
3. 3
   Top four with about 2 tbsp crumbled feta cheese, then cover with the other four.
4. 4
   Press together firmly to flatten, then crimp edges tightly to make four burgers. Chill.
5. 5
   Cook as regular burgers in a skillet or on the grill. Handle gently to avoid crumbling.
6. 6
   Serve on toasted white or rye bread with spicy mustard.