Heat oil in a large saucepan over moderately high heat. Cook and stir bacon for 5 minutes or until brown.
Add onion and garlic. Cook and stir for 5 minutes or until onion softens. Stir in flour until combined. Gradually add milk & cream, stock, carrot and potato, stirring. Bring to the boil. Reduce heat; simmer, uncovered, for 7-10 minutes or until sauce thickens.
Stir in corn and marinara mix. Cook and stir for 5 minutes or until seafood is just cooked. Remove from heat. Season with salt and ground white pepper.
Ladle soup into bowls. Serve sprinkled with chives.