Step 1

Puree cherry tomatoes and clam juice in a blender until smooth. Press mixture through a fine-mesh strainer into a bowl.

Step 2

Combine 3 tablespoons olive oil, green onions, garlic, anchovy, and 1 pinch red pepper flakes in a cold plan. Place over medium heat. Cook and stir until garlic and onions just start to soften, about 3 minutes. Stir in the tomato mixture. Bring to a simmer over medium-high heat. Reduce heat to medium and simmer stew until color deepens, about 10 minutes.

Step 3

Add halibut and shrimp to the stew. Season with salt. Increase heat to high. Cover pan and cook until fish flakes easily with a fork, about 5 minutes. Stir in parsley, basil, oregano, and rosemary. Pour stew into a warm bowl. Drizzle in remaining olive oil and sprinkle 1 pinch red pepper flakes on top. Serve with crusty bread.