Quick Paella with Chorizo Shrimp and Chicken

Name: Quick Paella with Chorizo, Shrimp and Chicken
Ingredients: 2 tablespoons olive oil; 1 cup sliced chorizo (about 8 ounces); 1 pound boneless, skinless chicken thighs, cut into cubes; 1 cup chopped Spanish onions (about 1 large); 2 tablespoons finely minced garlic; One 8-ounce box Spanish rice; 1 tablespoon tomato paste; Pinch of saffron threads; 1/2 cup white wine; 1 cup low-sodium chicken stock; 8 ounces peeled, tail-on medium shrimp; 8 ounces mussels; 1 cup frozen peas; Kosher salt and freshly ground black pepper; 1 cup sliced scallions