We start by preparing bone broth. Put the beef bones, peeled onions, garlic, salt and water in slow cooker and let it boil for 6 hours on low heat. If you have a multicooker, you can use it to prepare soup. Set slow cooker or multi cooker on high for 6-7 hours.
In a large bowl, put the strained bone broth, add miso paste, sesame oil, soy sauce and mix. Add the soup in a ramen bowl or in a deeper bowl.
In the meantime, we are dealing with the toppings. In a saucepan, add water, let the water reach the boiling point, turn off the heat and add the dehydrated shitake mushrooms. Leave them in the water for 10-15 minutes. After the mushrooms are ready, take them out of the water and cut them into strips.
In a pot add water and let it reach the boiling point. Add the noodles in boiling water and leave them for 5 minutes, then take them out and put them in the soup.
On top of the noodles add the mushrooms and the beef meat cut into strips, the finely chopped green onion, the boiled egg, and at the end we add the sesame seeds and chilli to taste. Enjoy!