Pho Tai Chin broth??? Anyone have a good recipe?

I would like a recipe that would be as close to what you would get in a Vietnamese Resturant. Pho Tai Chin, I know it is just beef stock, rice noodles, thin brisket, and then to add as you want, lime or lemon wedges, bean sprouts, green onion, cilantro, and Thai basil & of course the wonderful Sriracha hot chili sauce (Tuong Ot). I know the recipe for the most part, but I want a good recipe for the broth, but simple, and clear (a very light broth, nothing thick or heavy).