Rinse and brush mussels and remove the beard tufts. Discard open mussels. Cut sausages into slices, the pork into chunks, chicken into portion pieces. Peel and dice garlic cloves and onions. Clean, rinse and seed the peppers and cut them into strips. Blanch (scald) tomatoes (1 minute), remove skins, cut into quarters and remove seeds.
Heat half of the oil in a saucepan, season the chicken lightly with salt and fry for about 10 min, seasoning with a little salt. Add garlic and bell pepper strips, tomato quarters, diced onion and drained artichokes and sauté for about 5 min. Add mussels and sausage slices and braise for about 2 min.
Preheat the oven to 180 C.
Heat oil strongly in a paella pan or in a large suitable frying pan. Add long grain rice, clear soup and white wine and stir in saffron. Add meat, vegetables, and mussels, peas, and shrimp and stir to combine.
Place the paella dish in the oven and cook for 15-20 minutes. When the liquid is absorbed by the long grain rice, season with salt and pepper, garnish with lemon slices and bring to the table.