Heat the extra virgin olive oil in a wide skillet or paella pan over medium heat.
Add the diced Spanish chorizo and cook for 2 minutes until it begins to brown and release its flavorful oils.
Stir in the yellow onion and red bell pepper, sautéing for about 4 minutes until the vegetables are tender.
Add the minced garlic, smoked paprika, sea salt, and black pepper, stirring for 1 minute until fragrant.
Incorporate the Bomba rice and cauliflower rice, stirring to ensure every grain is well-coated in the spice mixture.
Pour in the chicken bone broth and add the saffron threads; bring the mixture to a gentle simmer.
Cook uncovered for 8 minutes, allowing the liquid to reduce slightly without stirring the rice.
Arrange the shrimp and scrubbed mussels on top of the rice mixture, pressing them down slightly into the liquid.
Cover the pan with a lid or foil and cook for 5-7 minutes until the shrimp are opaque and the mussels have opened wide.
Remove from heat, discard any unopened mussels, garnish with fresh parsley, and serve with a bright lemon wedge.