One Pot 5 Ingredient Tuscan Baked Fish

4.48 from 42 votes
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One Pot 5 Ingredient Tuscan Baked Fish – a super simple and crazy delicious baked fish recipe that is bursting with flavor and perfect for picky eaters!

baked fish with capers and tomatoes on it
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We add lots of tips in our recipe – so you can make this dish, understand why it works and what each ingredient means to the flavor of a recipe. I also answer questions my friends and family have asked about my recipes, to help home cooks of any skill level better understand the processes we use and why!

We love to eat fish in our house- but we don’t really eat enough fish to come up with a bunch of delicious, easy, go-to dishes that our whole family loves.

We usually do an easy lemon/garlic baked fish dish that is pretty easy to throw together, or blackened fish tacos- but we’ve been trying to start adding to more of our go-to’s as we try to incorporate more lean proteins into our diet.

While my husband and I like a wide variety of fish preparations, my kids most certainly do not.

They are pretty picky and don’t like “fishy” flavors or smells.

This 5 Ingredient Tuscan Baked Fish is a delicious, quick and easy meal that our whole family loves – and we bake it so you don’t need to worry about fishy smells, this is one dish even picky eaters love!

We hope you love this recipe as much as we do.

baked fish with capers and tomatoes on it

Easy Tuscan-Style Sauce

This dish, while being one-pot, is actually two different methods.

You’re first going to make a sauce and soften the onions, and then pop the whole thing in the oven with the fish.

Don’t rush the sauce – let onions soften and lightly brown to draw out as much flavor as possible without adding tons of other ingredients.

What Pan To Bake Fish In

Because we’re finishing the dish in the oven, it is imperative that you use an oven-proof pan, and please be careful when removing the pan from the oven.

I can’t tell you how many times my husband and I space that the pan is in the oven and go to grab it without a pot holder- its such a stupid thing to do, but we’ve sadly done it more than once!

How Long To Bake Fish

One important note- the cooking times listed for baking the fish in here might be way off, depending on the size and shape of your fish filets.

This application is great for so many types of fish- but that means it might take longer or shorter time in the oven to cook.

baked fish with capers and tomatoes on it in tomato sauce

When is Fish Cooked

Check your fish by pulling at the largest end with a fork- if it looks white and flaky inside, it is done.

If it is still a bit purple/translucent, it has a bit longer to be cooked through.

Some people prefer undercooked fish- but as I’m in a thoroughly landlocked state and make this dish with cheaper frozen filets, I prefer to take mine all the way.

What to Serve With Tuscan Baked Fish

This baked fish is great paired alongside easy roasted vegetables, including our whole roasted cauliflower, 10 minute broccolini, sauteed zucchini and squash, and Air fryer french fries.

For more of our favorite side dishes, please check out some of our latest:

For our complete side dish recipe archives, please click here.

Easy Tuscan Baked Fish Recipe

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baked fish with capers and tomatoes on it in tomato sauce

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A simple plate with a baked fish.

5 Ingredient Tuscan Baked Fish

Delicious baked fish bursting with flavor from simple ingredients!
Course Seafood
Cuisine American
Keyword fish, main dish, seafood, tuscan
Prep Time 5 minutes
Cook Time 25 minutes
Total Time 30 minutes
Servings 4
Calories 401kcal
Author Courtney ODell


  • 1 tbsp olive oil
  • 1 onion diced
  • 14.5 oz can diced tomatoes with oregano and basil or add your own herbs
  • 4 boneless skinless fish filets- cod, tilapia, or another flaky white fish- about 6-8g each
  • 2 tbsp capers drained
  • salt and pepper to taste


  • Preheat oven to 375 degrees.
  • In a large, oven proof pan, heat olive oil until shimmery on medium high.
  • Add in diced onion, cook about 8 minutes, until soft and slightly browned.
  • Add diced tomatoes, herbs (if you aren’t using herbed diced tomatoes add some basil and oregano- about 2 tsp each), and capers.
  • Sitr around and let reduce slightly, about five minutes.
  • Add fish to pan.
  • Pop in oven and bake about 15 minutes- until fish is flaky and white. This cooking time depends on the size of your filets and your oven- check after 8 minutes, and then again after 12.


Serving: 1g | Calories: 401kcal | Carbohydrates: 7g | Protein: 70g | Fat: 10g | Saturated Fat: 2g | Polyunsaturated Fat: 7g | Cholesterol: 228mg | Sodium: 558mg | Fiber: 3g | Sugar: 4g

About Courtney

Courtney loves to share great wine, good food, and loves to explore far flung places- all while masting an everyday elegant and easy style at lifestyle blog Sweet C’s Designs. Sweet C's devoted to finding the best food and drinks you'll want to make or find, around the world!

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4.48 from 42 votes (40 ratings without comment)

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Recipe Rating


  1. Julia says:

    5 stars
    That’s the Best recipe!!
    Thank You!! ?

  2. Lisa says:

    4 stars
    I don’t usually write reviews, but this was fantastic. So easy, healthy and yummy! Will def make again.

    1. LA says:

      Loved it with sole fillets, fire-roasted tomatoes seasoned with dried oregano & basil, enhanced with fresh basil leaves (torn). Because the fish was boneless and under one pound, cooked for only about 10 minutes, checking after 8. Delicious and healthy.

      1. LA says:

        This time, I added a small can of baby artichokes. Yum!

  3. arina says:

    I am going to try this one tonight!

  4. Jason says:

    This is so easy. I’ve made it a few times. Also doctoring it up a bit as I go. I like to add white wine sometimes, possibly some cream or brown butter the sauce and serve over angel hair or polenta. Nonetheless, tomatoes, fish and capers are about as versatile as you can get

  5. Kellea Tibbs says:

    i loved this so much the first time I made it a few weeks ago, I had to make it again tonight.

  6. Thalia @ butter and brioche says:

    I can’t say that I bake fish enough – but after seeing this post you definitely have motivated me to do so. This one pot tuscan baked fish looks divine and I can imagine how rich and flavoursome it is!