Stuffed Tenderloin

Directions

1. 1
   Saute onion over medium heat until tender.
2. 2
   Add spinach, salt and pepper; saute until spinach wilts.
3. 3
   Stir in cheese and tomatoes.
4. 4
   Cut tenderloin lengthwise down center.
5. 5
   (Do not cut completely through to the bottom.)
6. 6
   Lay flat and spoon spinach mixture down center of tenderloin.
7. 7
   Secure with string. Tenderloin won't close completely.
8. 8
   Place cut side up in a pan/casserole dish.
9. 9
   Cover with foil.
10. 10
    Bake at 425° for 50 minutes.