Heat a large cast iron skillet or heavy pot over medium-high heat. Add the ground beef and ground pork. Season with about 1 tbsp each of the CTH seasoning, Cajun seasoning, and onion powder, plus salt and pepper. Cook until fully browned, breaking the meat apart as it cooks. Drain excess grease if needed.
Add the diced onion, bell pepper, celery, and minced garlic directly to the pot with the browned meat. Cook for 4 to 5 minutes until softened and fragrant.
Stir in the tomato paste and cook for 1 to 2 minutes to deepen and develop the flavor. Add the Worcestershire sauce and Rotel and stir well to combine.
Add the bite-sized potatoes to the pot. Season again with the remaining CTH seasoning, Cajun seasoning, onion powder, salt, and pepper. Toss everything together until the potatoes are fully coated in the seasoned meat mixture.
Cover and cook over medium-low heat for 20 to 25 minutes, stirring occasionally, until the potatoes are completely fork-tender. Add a splash of water or broth if anything starts to stick or the mixture seems dry.
Once the potatoes are tender and slightly crispy around the edges, taste and adjust seasoning as needed. Top with sliced green onions and serve directly from the pot.