Tortilla Pie

Directions

1. 1
   Preheat oven to 400 degrees.
2. 2
   Using a paring knife, trim tortillas to fit a 9-inch springform pan (use the removable bottom of the pan as a guide).
3. 3
   Assemble pan with the bottom upside down; lightly oil bottom and sides.
4. 4
   Set aside.
5. 5
   In a large skillet, heat oil over medium.
6. 6
   Add onion, cumin, and red-pepper flakes; season with salt and pepper.
7. 7
   Cook until onion has softened, 3 to 5 minutes.
8. 8
   Stir in tomato paste.
9. 9
   Raise heat to medium-high; add beef and garlic.
10. 10
    Cook, breaking up meat with a spoon until no longer pink, 4 to 6 minutes.
11. 11
    Add corn and spinach; stir until spinach has wilted, about 2 minutes.
12. 12
    Place one tortilla in the prepared pan.
13. 13
    Spreading evenly, top with 1 1/2 packed cups beef mixture, then 1/2 cup cheese.
14. 14
    Repeat with two more layers.
15. 15
    Top with last tortilla, and sprinkle with remaining 1/2 cup cheese.
16. 16
    Bake pie until top is lightly browned, 15 to 20 minutes.
17. 17
    Run knife around edge of pan; remove sides.
18. 18
    Using two wide metal spatulas, lift pie from bottom of pan, and transfer to a cutting board.
19. 19
    Cut into wedges.
20. 20
    If desired, serve with cilantro and sour cream.