Place a 14 to 15-inch paella pan over medium-high heat.
Add olive oil.
Season chicken and pork with 1/2 teaspoon salt and black pepper.
Add chicken and pork to pan.
Cook until browned on all sides.
Add sausage and cook until lightly browned.
Move meats toward edges of pan.
Add cuttlefish or squid to center of pan.
Cook 2 to 3 minutes.
Add onion and cook until softened.
Add garlic and cook briefly.
Add grated tomato.
Cook until tomato thickens and darkens slightly.
Stir in paprika and saffron.
Add rice and stir 1 minute to coat grains with oil and sofrito.
Add seafood stock, chicken stock and remaining 1/2 teaspoon salt.
Stir once to distribute rice evenly.
Bring liquid to a strong simmer.
Cook over medium-high heat 8 minutes.
Arrange shrimp, mussels, crayfish, peas if using and roasted red pepper if using over rice.
Reduce heat to medium-low.
Cook 10 to 12 minutes, without stirring, until rice is nearly tender and liquid is mostly absorbed.
Increase heat to medium-high for 1 to 2 minutes to form a toasted bottom crust.
Listen for gentle crackling, but do not let rice burn.
Remove pan from heat.
Cover loosely with a clean kitchen towel.
Let paella rest 5 to 10 minutes.
Sprinkle with parsley.
Serve with lemon wedges.