Add enough water to cover the ramen noodles in a large pot. Bring the water to a boil and add salt. Cook the noodles according to the package instructions.
While the ramen is cooking, reheat the birria broth and shredded birria in medium pots or saucepans until hot, about 5-8 minutes.
Strain the ramen noodles and place them into 4 bowls.
Assemble the birria ramen by pouring 1 cup of birria broth and ½ cup of shredded birria into each of the bowls.
Top with sliced radishes, sesame seeds, cilantro, red onion, lime juice, and a soft-boiled egg. Serve immediately.
Notes
This recipe is great to make when you have leftover birria. You can also make the birria on the same day; just note that it will take some preparation ahead of time. Use my birria recipe.
Adjust the broth. My birria broth has a thicker consistency. If you like a soupy broth, add ½ - 1 cup of beef broth to the birria broth or some of the ramen noodle broth to thin it out.
Add some spice. Add sriracha or sprinkle red pepper flakes for extra spice.
Cooking the noodles. I recommend cooking the noodles separately in water instead of the birria broth. I find the end result to be too greasy when cooked in the birria broth.