Chorizo and Shrimp Paella

Name: Chorizo and Shrimp Paella
Ingredients: 1 medium onion, quartered; 2 celery stalks, coarsely chopped; 4 garlic cloves; 2 small tomatoes; 2 tablespoons plus ½ cup olive oil; 1 pound Spanish chorizo, casings and ends removed, sliced into rounds; 8 ounces shrimp, peeled, deveined; 2 teaspoons kosher salt, plus more; ¾ cup dry white or rose wine; 2 teaspoons smoked paprika; ½ teaspoon sugar; Back-Burner Stock; 1 teaspoon saffron threads; 1½ cups bomba rice; 1 cup green olives (such as Castelvetrano), pitted, torn into large pieces; 1 lemon, plus wedges for serving; Radish sprouts (for serving); Flaky sea salt