1 (9-ounce) bag red or blue corn tortillas
1 (15-ounce) can black beans, drained and rinsed
1 (12-ounce) jar marinated and quartered artichoke hearts
1 (8-ounce) bag pre-shredded Monterey jack
5 plum tomatoes, seeded and diced
1 cup sour cream
1/2 bunch scallions, cut into 1/4-inch thick slices