Steps

• 1

  Cook the pasta. Bring a large pot of salted water to a boil over high heat. Add the noodles and cook according to package directions to al dente. Strain, and set aside.

• 2

  In a medium sauce pan over medium heat, melt the butter. Add the onion and sauté until tender. Add garlic and sauté 1 minute, until fragrant. Add the flour and cook for 1 minute.

• 3

  While whisking, slowly add in the milk and cook until thickened and the sauce can coat the back of a spoon. Season to taste with salt and pepper, and stir in the mustard and ketchup.

• 4

  Remove the pan from the heat and whisk in 1 1/2 cups cheddar and 1/2 cup gruyere cheese. Set aside.

• 5

  When ready to cook, set the Traeger temperature to 400°F and preheat with the lid closed for 15 minutes.

  400 ˚F / 204 ˚C

• 6

  Place the frankfurters directly on the grill grates. Close the lid and grill the frankfurters for 4-6 minutes, turning occasionally until warmed through and lightly browned.

  00:04

• 7

  Remove the frankfurters from the grill and slice. Reduce the grill temperature to 350°F.

  350 ˚F / 177 ˚C

• 8

  Add the sliced frankfurters and noodles to the cheese sauce and stir to coat.

• 9

  Pour the mac and cheese into a greased cast iron pan, top with remaining the cheese.

• 10

  Place the cast iron pan on the grill grates. Close the lid and bake for 20-25 minutes, or until the top is golden brown and cheese is melted.

  00:20

• 11

  Remove the mac and cheese from the grill. Top with additional ketchup, and mustard, if desired, and serve warm. Enjoy!