Tomatoes and chorizo mussels - Le Coup de Grâce

Ingredients

• 1 yellow onion, finely chopped
• 3 garlic cloves, finely chopped
• Olive oil
• 250 g PEPE sausage from the Pork Shop Charcutiers (or chorizo), diced
• 4 large tomatoes, diced (save one for last)
• 1 large handful fresh parsley, finely chopped + a little for serving
• 1/4 cup white wine
• 2 tablespoons tomato paste
• 1 tablespoon sugar
• 1/2 teaspoon dried oregano
• 2 lb fresh mussels cleaned and sorted
• 1 cup finely grated Pecorino Romano cheese
• Salt and pepper from the mill