Mediterranean Seafood Stew with Polenta Cubes

Name: Mediterranean Seafood Stew with Polenta Cubes
Ingredients: 6 Tbs. (2 oz./60 g) gluten-free medium-grind cornmeal; Kosher salt and freshly ground pepper; 2 Tbs. olive oil; 1 large yellow onion, chopped; 1/2 tsp. fennel seeds, crushed; 1/4 tsp. red pepper flakes; 2 cans (14 1/2 oz./455 g each) diced tomatoes with juices; 2 bottles (8 fl. oz./250 ml each) clam juice; 1 cup (8 fl. oz./250 ml) dry white wine; 2 Tbs. tomato paste; 2 strips orange zest, each about 1 1/2 by 1/2 inches (4 cm by 12 mm); 2 lb. (1 kg) Manila clams; 1/2 lb. (250 g) medium shrimp (31 to 35 per pound), peeled and deveined; 1/2 lb. (250 g) bay scallops; 1/3 cup (1/2 oz./15 g) fresh basil, slivered