Oven Paella with Chicken Shrimp and Chorizo

Name: Oven Paella with Chicken, Shrimp, and Chorizo
Ingredients: ½ teaspoon saffron threads; 1 tablespoon hot water; Olive oil; ½ pound smoked chorizo, sliced into ½-inch thick coins; 2 pounds boneless, skinless chicken thighs, cut into bite-size pieces; 1 large onion, diced; 1 green bell pepper, cored and diced; 1 red bell pepper, cored and diced; 6 cloves garlic, minced; 2¼ cups Arborio or other short-grain white rice; One 28-ounce can diced tomatoes, drained; 1 cup white wine; 4 cups low-sodium chicken broth; 2 teaspoons salt; Freshly ground black pepper; 1 pound small shrimp, peeled and deveined; ½ pound mussels, cleaned; 2 tablespoons unsalted butter, melted; Smoked paprika, for garnish