Heat olive oil in a large skillet or paella pan over medium heat. Add the chorizo and cook for 2-3 minutes until slightly crispy. Remove excess fat if needed.
Add the onion to the pan and cook for 2-3 minutes until soft. Stir in the garlic and cook for another minute.
Add the rice, smoked paprika, salt, and pepper. Stir for 1-2 minutes until the rice is lightly toasted and coated in the flavors.
Pour in the broth, crushed tomatoes, and saffron. Stir to combine and bring to a simmer. Reduce heat to medium-low and let cook without stirring for about 15 minutes.
Nestle the shrimp, mussels/clams, fish, and scallops into the rice. Cover and cook for another 10 minutes, or until the mussels/clams open, the shrimp turns pink, and the scallops are opaque.
Sprinkle in the frozen peas and cook for 2 more minutes. Remove from heat and let it sit for 5 minutes. Garnish with parsley and serve with lemon wedges.