Start by heating your pan over medium-high heat. Add the sliced chorizo and let it brown on both sides until slightly crisp. The fat released during cooking creates a flavorful base for the entire dish. Remove the chorizo and set aside once browned.
Add the chicken thighs to the same pan and cook until golden on both sides. Browning adds depth and seals in juices. Once cooked through, remove from the pan and let rest before slicing into strips.
In the same pan, add diced onion and garlic. Cook until softened and fragrant, scraping up any browned bits. Stir in the arborio rice and toast it gently so each grain is coated in the flavorful oil.
Pour in the chicken broth and diced tomatoes. Add saffron, salt, and pepper, then stir to combine. Reduce heat and allow the rice to simmer gently until most of the liquid is absorbed.
Once the rice is tender, mix in lemon juice, zest, and frozen peas. The peas warm quickly and add a fresh sweetness. The lemon brightens the entire dish beautifully.
Slice the rested chicken and return it along with the chorizo to the pan. Nestle everything into the rice and let it warm together for a few minutes so flavors meld.
Sprinkle chopped parsley over the top before serving. The fresh herbs add color and a final burst of flavor. Serve directly from the pan for a rustic presentation.