Cook chicken with fajita seasoning over medium heat in the bottom of stock pot, about 5 minutes. While it cooks, prep seasoning blend of garlic salt, red pepper flakes, cumin, chili powder, oregano, and salt in a ramekin. Set seasoning blend aside.
Add bell peppers, onion, diced tomatoes, veggie stock, water, olive oil, sriracha, seasoning blend, and penne to pot with chicken. Bring to a boil.
Boil for 11 minutes, or until pasta is tender, stirring frequently.
Mix in a splash of lime juice and serve.
