Heat the extra virgin olive oil in a paella pan or wide heavy-bottomed skillet over medium heat.
Add the diced Spanish chorizo and sauté for 2-3 minutes until the oils are rendered and the edges are slightly crisp.
Stir in the diced yellow onion and red bell pepper, cooking until the vegetables have softened and become translucent.
Add the minced garlic, smoked paprika, and saffron threads, stirring constantly for 30 seconds to release the aromatics.
Add the bomba rice to the pan, stirring well for 1 minute to ensure every grain is toasted and coated in the spiced oil.
Pour in the tomato puree and seafood stock, then season with sea salt and black pepper; stir once to distribute and then do not stir again.
Simmer the mixture over medium-low heat for 10-12 minutes until the liquid is mostly absorbed and the rice is nearly tender.
Nestle the shrimp and mussels into the rice, cover the pan with a lid or foil, and cook for an additional 5-7 minutes until the shrimp are pink and the mussels have opened.
Remove from heat, garnish with freshly chopped parsley, and serve immediately with a bright lemon wedge for squeezing.