Chorizo and butterbean stew

Ingredients

• 1 tbsp olive oil
• 1 medium onion, (peeled and thinly sliced)
• 75 g cooking chorizo, (cut into very thin slices)
• 2 garlic cloves, (peeled and very thinly sliced)
• 1 tsp smoked paprika
• 400 g can chopped tomatoes
• 400 g can butter beans, (drained and rinsed)
• flaked sea salt
• ground black pepper
• roughly chopped flat leaf parsley, (to serve)