Heat 1 tablespoon of the oil in a large skillet over medium-high heat. Add the chorizo and cook until browned on all sides. Transfer the chorizo to a plate.
Heat the remaining oil in the same skillet over medium-high heat. Add the onion and bell pepper and cook for 3 to 5 minutes, until soft. Add the garlic and cook for 30 seconds.
Add the tomatoes, paprika, saffron, 1/2 teaspoon salt, and 1/4 teaspoon black pepper and stir to combine. Cook for 1 minute. Add the wine and bay leaf and bring to a simmer.
Simmer for 2 minutes. Return the chorizo to the pan with any accumulated juices from the plate. Add the chicken and rice and stir to combine. Cook for 1 minute without stirring.
Gradually add the broth, pouring it all over the ingredients. When all the broth has been added, jiggle the pan so the rice is in an even layer.
Bring to a boil. Reduce the heat to medium-low and cook for 15 minutes, shaking the pan gently back and forth every 5 minutes; do not stir (we don’t stir the mixture because the goal is to create a crispy, slightly fried bottom crust).
After 15 minutes of cooking, nestle the shrimp, mussels, and calamari rings in the rice mixture. Pour the peas over top.
Cook for 5 to 10 more minutes, until the liquid is absorbed, the rice is tender, and the seafood is cooked. If your rice is not tender at this point, add 1/4 cup of chicken broth or water and cook until the rice is tender. Discard any mussels that have not opened.
Remove the pan from the heat and cover with a lid or aluminum foil. Let stand for 10 minutes.
Top with fresh parsley and serve with lemon slices.