Season the cod fillets with salt, pepper and the Italian seasoning on both sides.
Heat a large pan on medium heat then drizzle in some olive oil. Once hot, add in the shallots and saute for about 2 minutes
Add in the crushed garlic and cook for another 1-2 minute, until fragrant
Pour in the can of whole tomatoes, water and spices. Cover and cook on medium/low for about 5-6 minutes.
Gently mash the tomatoes then taste and adjust any seasoning to your liking. Add in the olives and the cod fillets. I like to sprinkle a little extra Italian seasoning over the top
Cover the pan and simmer the fish for about 8-10 minutes, until the cod flakes easily with a fork.
Garnish with a drizzle of olive oil, fresh chopped basil and parsley