Heat the extra virgin olive oil in a paella pan or wide skillet over medium heat.
Add the diced chorizo and sauté until the oils are released and the sausage is slightly crispy.
Stir in the diced onion and red bell pepper, cooking for 3-4 minutes until softened.
Add the minced garlic, smoked paprika, and bomba rice, stirring for 1 minute to toast the grains.
Pour in the seafood stock, tomato puree, and saffron threads, then season with sea salt and black pepper.
Bring the mixture to a gentle simmer, then reduce the heat to low and cook undisturbed for 10 minutes.
Arrange the shrimp and mussels on top of the rice, pressing them down slightly into the liquid.
Cover the pan and cook for another 8-10 minutes until the seafood is cooked through and the rice has absorbed the liquid.
Increase the heat to medium for the final 60 seconds to develop the socarrat crust on the bottom of the pan.
Scatter the frozen peas over the top to warm through and serve immediately with a fresh lemon wedge.