• Preheat oven to 350° or light your smoker and heat to 350 degrees.

For the Pasta

• In a large pot of salted water, bring water to a boil over medium high heat.
• Add pasta and onion into water and cook pasta until al dente. Drain, and immediately pour into the cheese Sauce

For the Cheese Sauce

• Melt butter in a large cast iron skillet over medium heat.
• Sprinkle flour into the pan and whisk for two minutes, stirring constantly.
• Gently pour milk into the skillet, stir until it begins to thicken, about two minutes.
• Add hot sauce and seasonings, stir.
• Next, add Velveeta, stir until almost melted, then add cheddar and Gruyere. Stir until melted.
• Remove skillet from heat and pour pasta and onions into cheese sauce and stir until combined.

For the Topping

• Smooth out the top and sprinkle with muenster cheese followed by freshly grated Parmesan.
• Place in preheated oven and bake uncovered for 30-35 minutes or until cheese starts to brown, or into the smoker and smoke for 30 minutes to 2 hours depending on how deep you want the smoke flavor..