serves 6–8 people
Cook Chicken & Shrimp: Rub the paprika, sea salt, rosemary and chili pepper flakes all over the chicken pieces. Drizzle oil into 15-inch paella pan set on stovetop over medium-high heat. Add chicken and cook until browned. Remove to plate. Brown shrimp (if using) in pan 2 minutes, remove to plate.
Sofrito: Add olive oil to paella pan set over medium-high heat. Add onions and cook until translucent, 5 minutes. Add tomato paste, paprika, and garlic and scrape pan from outside into center. Cook about 2 more minutes.
Rice: Add the rice and cook for a minute. Add 1 cup white wine and saffron, boil for a minute. Add broth/water, sprinkle with salt, bring to boil, add back the chicken and cook, stirring every minute or so for 10 minutes; get rice in an even layer then arrange the chorizo slices, shrimp, shellfish, peppers and peas on top of the boiling rice; lower heat and simmer for 15 minutes. Remove from heat, cover with foil and let stand 10 minutes before serving. Garnish with parsley and lemon wedges.