Preheat the oven to 350 degrees.
In a deep frying pan or cast iron skillet, over medium heat, cook chorizo until done and transfer to a bowl. Set aside.
Drain grease, reserving 1 tablespoon.
Add diced bell pepper and onions to the skillet and cook until tender.
Sprinkle the veggies with flour and continue cooking for 2 minutes.
Pour chicken broth and heavy cream into the skillet, and bring to a boil.
Stir in seasonings, and continue to cook over medium low heat.
Bring a large pot of water to a boil and cook pasta according to package directions for al dente. Drain and set aside.
Add one cup each of both cheeses to the sauce. Stir to combine.
Next, add the chorizo, black beans, corn, Rotel, and diced green chilies to the sauce. Stir.
Add Rotel. Stir to combine.
Pour cooked pasta into sauce mixture, stir to combine.
Sprinkle the remaining cheddar and Monterey jack cheese over the top.
Place in the preheated oven and bake for 20 minutes, 10 minutes covered, and 10 minutes uncovered, until the cheese is melty.
Remove from the oven and enjoy with some crusty bread and a side salad.