In a large skillet over med-high heat, brown the ground beef until almost done. Drain grease. Add diced green chilies. Cook for an additional minute.
Add taco seasoning, water, salsa and rotini. Bring to a boil. Stir, cover and reduce heat to simmer. Cook for 15 minutes or until the rotini is tender.
Stir in the shredded cheese. Season with salt and pepper to taste and add optional toppings if you wish. Enjoy!