In a bowl, season shrimp with olive oil, cajun seasoning and salt
To a skillet on medium heat, melt butter an sauté shrimp until just cooked, about 4 minutes
Remove shrimp and set aside
To a cast iron skillet, add a layer or chips, followed by cheese, black beans and cheese
Repeat the layering until you get to the top of the skillet
The final layer should be cheese
Broil until cheese is melted, about 2-3 minutes
Top with desired toppings, serve warm and enjoy