Mexican Lasagna

Mexican Lasagna:
(from Misty Segalla)

1 cup fresh cilantro leaves
4 scallions, coarsely chopped (onions)
Coarse salt and ground pepper
10 ounces fresh baby spinach
8 (6-inch) corn tortillas
1 (15.5 ounces) pinto beans, drained and rinsed
1 cup prepared salsa (mild or medium)
8 ounces pepper Jack cheese, grated (about 2 cups)

(I added shredded chicken-cafe rio that had been frozen. It was yummy, but also added a lot of water and made the tortillas disappear. I am sure if it wasn't frozen it would have been perfect.)

Preheat oven to 425 degrees. In a food processor, combine cilantro, scallions, 1 teaspoon salt, and 1/4 teaspoon pepper with as much spinach as will fit; pulse, adding remaining spinach in batches, until coarsely chopped.
Coat an 8-inch square baking dish with cooking spray. Lay 4 tortillas in bottom of dish (they will overlap slightly). Layer with half of beans, salsa, spinach mixture, and cheese; repeat with remaining ingredients, ending with cheese and pressing in gently.
Cover dish with foil; place on a rimmed baking sheet. Bake until bubbling, 25 to 30 minutes; remove foil, and continue baking until golden, 15 to 20 minutes more. Cool 5 to 10 minutes before serving.