This is from America's Test Kitchen. Be sure to use "dry" (untreated) scallops. You can sub 12 oz quartered sea scallops for bay scallops, depending on availability. Use arborio rice, low salt (pref homemade) chicken stock.
12 oz large shrimp, 26-30 per pound, peeled & deveined, reserve shells
2 cups chicken stock
2 1/2 cups water
4 8-oz bottles clam juice
1 14 1/2 oz can diced tomatoes, drained
2 bay leaves, fresh preferred
5 Tbsp olive oil
1 onion, chop fine
2 cups Arborio rice
5 cloves garlic, minced
1 tsp minced fresh thyme or 1/4 tsp dried
1/8 tsp saffron threads, crumbled
1 cup dry white wine
12 oz small bay scallops
2 Tbsp minced fresh parsley
1 Tbsp fresh lemon juice
salt & pepper
Bring shrimp shells, stock, water, clam juice, tomatoes & bay leaves to boil in large saucepan over medium high heat. Reduce to simmer & cook 20 minutes. Strain into bowl, pressing on solids to extract liquid. Discard solids (in compost). Return broth to pan, cover, keep warm. Heat 2 Tbsp olive oil in Dutch oven medium heat until shimmering. Add onion, cook until soft, about 5 minutes. Add rice, garlic, thyme, saffron, cook stirring until rice begins to turn translucent, about 3 minutes. Add wine, cook stirring until fully absorbed, about 3 minutes. Stir in 3 1/2 cups of the warm broth, bring to simmer, cook stirring occasionally until almost fully absorbed, 13-17 minutes. Continue to cook stirring frequently and adding warm broth one cup at a time every few minutes as liquid is absorbed, until rice is creamy and cooked through but still a bit firm in center, 13-17 minutes. Stir in shrimp and scallops, cook stirring frequently until opaque, about 3 minutes. Adjust consistency with more warm broth if needed. You might have leftover broth, use it for your next batch of soup. Add remaining 3 Tbsp olive oil, parsley, lemon juice. Season to taste. Eat, making sure to give the cat a taste of seafood.