Clean mussels and discard any that are not completely closed.
In a large saute pan that has a lid (preferably a glass lid,, so you can see), turn it on medium-low head and add 2 tbsp butter, 2 tbsp olive oil, butter, and shallots. Saute until fragrant.
Once fragrant, turn head up to medium and add tomato paste and calabrian chilis, and saute until tomato paste has become a deeper color red.
Add mussels to pan, shake around, add white wine, and cover.
Remove each mussel as they open and put in a bowl. That means they are ready. Re-cover pan if you need to between removing them.
To pan, add remaining 4 tbsp of butter and a pinch of salt, then toss with al dente pasta and fresh parsley.
Serve with Mussels and garlic bread breadcrumbs