Heat olive oil in a large skillet over medium heat.
Add chopped onion and garlic, cook until softened.
Add Arborio rice, stir to coat with oil.
Pour in chicken broth and saffron threads, bring to a boil.
Reduce heat, simmer for 15 minutes.
Add diced tomatoes, peas, shrimp, and mussels.
Season with paprika, salt, and pepper.
Cover and cook for another 10 minutes or until seafood is cooked through.
Garnish with chopped parsley before serving.