Tortilla and Black Bean Pie

Name: Tortilla and Black Bean Pie
Ingredients: 4 flour tortillas (10 inches); 1 tablespoon canola oil; 1 large onion, diced; 1 jalapeno chile, minced (remove seeds and ribs for less heat); 2 garlic cloves, minced; ½ teaspoon ground cumin; Coarse salt and freshly ground pepper; 2 cans (15 ounces each) black beans, drained and rinsed; 12 ounces beer, or 1 ½ cups water; 1 package (10 ounces) frozen corn; 4 scallions, thinly sliced, plus more for garnish; 8 ounces cheddar cheese, shredded (2 ½ cups)