In a bowl, mix chicken with olive oil, paprika, oregano, salt, and pepper. Marinate for 15 minutes.
Heat oil in a large pan, sauté garlic and red pepper flakes.
Add rice, saffron, bay leaf, and parsley. Stir to coat with oil.
Pour in chicken stock and lemon zest. Let it simmer.
In another pan, sauté onion and bell pepper. Add to the rice.
Add marinated chicken and chorizo to the rice mixture. Cook until chicken is browned.
Place shrimp on top, cover, and cook until shrimp are pink and rice is tender.
Garnish with parsley and serve hot with lemon wedges.