sentence: prepare some healthy mussels that can close firmly sentence: chop half a white onion 3 cloves of garlic and some coriander sentence: heat a pot with some olive oil add onion butter stir a little bit around sentence: add garlic cleaned mussels coriander chilli flakes drizzle of white wine and give a stir sentence: pour the crashed tomatos into the pot and toss through sentence: cover the lid and cook until all the mussels are widely open sentence: serve the mussels with the sauce in the pot