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Dinner · Part 2 of 3: Instructions

Slow Cooker Monkfish à l’Américaine for an Easy Weeknight Dinner Step-by-step instructions

A close-up of monkfish chunks simmering in a rich tomato sauce inside a slow cooker on a quartz countertop.
Prep
Cook
Total
Serves
4

Before you start

Before beginning, ensure that your monkfish is cleaned and cut into uniform, large chunks to allow for consistent cooking. Peel and thinly slice your shallots, keeping the slices consistent so they soften uniformly.

Have your crushed tomato sauce and white wine mixture ready, and crumble the bouillon cube beforehand to ensure it is ready to be sprinkled over the fish without delay, keeping the preparation process smooth and efficient from start to finish.

Ingredients at a glance (4)
  • 1 1/2 lb monkfish fillets, cut into large chunks
  • 3 medium shallots, thinly sliced
  • 1 fish bouillon cube, crumbled
  • 2 cups crushed tomato sauce with white wine

Instructions

Layering the Ingredients

  1. Prepare the Slow Cooker Base
    Place the monkfish chunks in the bottom of the slow cooker. Scatter the thinly sliced shallots evenly over the fish to ensure even flavor distribution during the cooking process.
    Look for The fish should be arranged in a single layer if possible for even cooking.
    Tip Pat the monkfish dry with paper towels before placing it in the cooker for a cleaner look.

At the start of the process, the fish should be neatly arranged in the bottom of the slow cooker. The shallots should be spread evenly over the surface to provide a base of aromatic flavor.

Everything should look organized and ready for the liquid. Check that the slow cooker is clean and ready, and ensure you have all ingredients measured and prepared before you start the assembly to keep the process efficient and stress-free.

Adding the Sauce

  1. Add Aromatics and Sauce
    Sprinkle the crumbled bouillon cube over the shallots and fish. Carefully pour the crushed tomato sauce with white wine over the top, ensuring that all ingredients are well-moistened by the liquid.
    Look for Ensure the bouillon is distributed evenly to avoid concentrated salty spots.
    Tip Use a spatula to gently nudge the ingredients if needed so the sauce covers the fish.

Once the bouillon and tomato sauce are added, the slow cooker will look quite full, but the liquid should not completely submerge the fish. The aroma of the tomatoes and wine should start to be noticeable as you pour. Check that the bouillon is evenly distributed and not clumped in one area. Once the lid is on, the slow cooking process begins, and you can leave it to develop its deep flavor profile.

Final Cooking Stage

  1. Slow Cook and Serve
    Cover and cook on low for 3 hours. The fish is done when it reaches an internal temperature of 145°F (63°C) and flakes easily with a fork. Serve immediately over warm rice.
    Look for The sauce should be bubbling gently and the fish opaque and firm.
    Safe temperature 145°F (63°C) internal temperature (fish)
    Tip Check the temperature in the thickest part of the fish to ensure it is cooked through.

As the cooking concludes, the house will be filled with a savory, aromatic scent. The fish should look tender and opaque, having absorbed the colors and flavors of the tomato sauce. The sauce itself will have thickened slightly and appear glossy.

Before serving, check the internal temperature of the thickest part of the monkfish to ensure it has reached 145°F (63°C). The dish is now ready to be portioned and served immediately over warm rice.

Common mistakes

Avoid overcooking the monkfish, which can lead to a tough and chewy texture. While the slow cooker is forgiving, check the temperature as the cooking time approaches the end.

Another common mistake is adding too much liquid; the fish will release its own moisture, so the sauce should be thick rather than watery. Ensure the shallots are thinly sliced to allow them to fully melt into the sauce, providing a smooth finish rather than large, crunchy pieces.

How to tell it’s done

The monkfish is perfectly cooked when it reaches an internal temperature of 145°F (63°C). At this point, the flesh will turn opaque and should flake easily when tested with a fork. Using a meat thermometer is the most reliable way to check, as it prevents the fish from becoming rubbery. If the fish is not yet at the required temperature, continue to cook for short intervals until it is fully cooked and tender.

  • Fish: 145°F (63°C) in the thickest part

Coming up in Part 3: common questions

  • Can other types of fish be used in this recipe?
  • How can the sauce be thickened if it is too thin?
  • Is it necessary to use white wine?

Also in Part 3: variations (Spicy Tomato Version, Herb-Infused Sauce), storage and make-ahead, and the printable recipe card.

Up next · Part 3 of 3

2 variations · storage & make-ahead · 3 answers · printable card

Tips, FAQ & printable recipe (Part 3)← Back to the ingredients (Part 1)