Heat olive oil over medium high heat. Tear up chorizo and add to hot oil for 2-3 minutes to brown. Remove with slotted spoon and set aside. Add minced shallot, sliced garlic and black olives. Let cook for 1-2 minutes. Add white wine, mussels and cover. Let cook for 5-10 minutes until mussels have opened. Garnish with parsley and top with chorizo. Serve with warm bread.