Grilled Sheet Pan Paella

Name: Grilled Sheet Pan Paella
Ingredients: 5 cups low-sodium chicken broth; 1/2 teaspoon saffron; 3 tablespoons extra-virgin olive oil, plus more for drizzling; 4 links precooked chorizo (about 12 ounces), cut into 1-inch chunks; 1 medium onion, chopped; 1 red bell pepper, chopped; Kosher salt; 2 cloves garlic, chopped; 2 cups long-grain rice; 1 1/2 pounds mussels, scrubbed; 1 pound large shrimp, peeled and deveined, tails on; 1/2 cup frozen peas, thawed; 4 scallions, chopped; 1/2 cup chopped fresh flat-leaf parsley