Defrost seafood in a sieve. Peel onion and garlic and dice finely. Clean and wash the vegetables. Cut beans into pieces, peppers into strips. Peel the skin from the chorizo, cut the sausage into slices.
Wash chicken legs, dab dry and rub with salt and pepper. Heat 2 tablespoons of oil in a paella pan or large frying pan (approx. 35 cm Ø, at least 5 cm high). Fry the chorizo in it for 1-2 minutes, remove.
Dab seafood dry and fry in hot frying fat all around, remove. Season with salt and pepper and remove. Heat 2 tablespoons of oil in a frying pan. Fry the onion, garlic and paprika for 2-3 minutes.
Steam the rice briefly. In the meantime boil 1 litre of water. Dissolve saffron and 1/2 teaspoon salt in it, add. Bring everything to the boil while stirring. Add seafood, legs, chorizo, beans and frozen peas.
Simmer the paella on the stove for 20-30 minutes without stirring or bake in the preheated oven (electric stove: 200 °C/ convection oven: 175 °C/ gas: level 3) on the bottom rack for 30-40 minutes until all liquid is absorbed.
Cover the paella with a tea towel and let it rest for 5-8 minutes. Sort out closed mussels. Season paella with salt and pepper. Garnish with parsley.