In a large cast iron skillet over medium heat, add the ground beef. Season with salt, pepper, Kinder's, and Creole Trinity and Herb seasoning. Cook until about halfway browned, then add the Worcestershire sauce. Continue cooking until fully browned. Drain excess grease if needed.
Add the butter, thinly sliced onion, and minced garlic directly to the skillet. Cook for 3 to 5 minutes until the onions soften and turn slightly golden. Sprinkle in the brown gravy mix and stir to coat everything evenly.
In a small bowl, whisk together the cream of mushroom soup and 1 cup of the beef broth until smooth. Pour into the skillet and stir to combine.
Add the uncooked orzo and pour in the remaining 1 1/2 cups of beef broth. Stir well and bring to a light simmer. Reduce heat to low, cover, and cook for 10 to 12 minutes, stirring frequently, until the orzo is tender and the sauce is thick and creamy. If it gets too thick, add a splash of broth or water as needed.
Taste and adjust seasoning with extra salt and pepper if needed. Remove from heat, top with sliced green onions, and serve warm.