Arrange the tortilla chips on a large platter or a shallow, round casserole dish, about 14 inches in diameter. Sprinkle evenly with the cheese, followed by the chili peppers, corn, beans, and tomato.
Bake for 8 minutes, more or less, until the cheese is well melted. Or microwave for 3 minutes.
Scatter the spinach over the top and return to the oven for 2 minutes or so, or to the microwave for another minute, just until it wilts.
Serve at once. Pass around salsa to top individual portions, as well as any of the optional garnishes.