1teaspoonhot chili sauce (like Sriracha), or more to taste
Scrub the mussels and discard any with broken shells.
Heat a wok or saute pan over medium-high heat and swirl in the cooking oil. Add the onions and saute for 2 minutes. Add in the ginger and garlic and cook until fragrant, about 30 seconds. Add in the broth, miso and hot chili sauce and turn the heat to high.
When simmering, add the tomatoes, vegetables and the mussels. Cover and let steam for 3 minutes or until the mussels have opened. Discard any mussels that have not opened. Serve with lime.