What is this NABE called??

Last Saturday, I went to a restaurant to have dinner.
This picture is the main dish.
It looks like Chanko-nabe, but soup is VERY different!
And, taste is very unique! I like it!
We can put anything into the pot; vegetables, meat, and seafoods!



This picture is the soup.
It is mixed Japanese "dashi" and a plant.
This plant makes the soup that color (red? or orange?)!

Can you guess the plant???

→This is the picture of the plant.
It is used for coloring.



←Kaji answered my question!
The correct answer is saffron.
It is used for saffron rice with curry. Very spicy curry.