Lay out a large sheet of heavy-duty foil. Spread tortilla chips in a single layer in the center of the foil. Sprinkle black beans, cheddar cheese, tomatoes, red onion, and black olives over the chips. Fold the foil over to form a packet, sealing the edges tightly. Place the packet on the grill or in the campfire and cook for 10-12 minutes, until cheese is melted and bubbly. Carefully open the packet and sprinkle cilantro over the top. Serve with salsa and sour cream.
