Defrost the seafood.
Thinly slice the onion, then chop the garlic.
Heat 1 Tbsp olive oil in large pan and cook the onion and garlic until soft.
Meanwhile, wash the carrots, then add to the onion and sauté for 5 minutes. Add the other veggies, put the lid on and cook for 3 minutes. Season with pepper and add the broth and chopped tomatoes.
Bring it to the boil, then add the spaghetti. Cook for about 7-8 minutes, then add the seafood. Cook for 3-5 minutes. When the pasta is al dente and the sauce is thick and silky, turn off the heat.
Season to taste and serve with chopped herbs sprinkled on top.