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Slow Cooker One-Pot

Slow Cooker Herb-Crusted Cod with Lemon and Garlic

By PanPotPlates Test KitchenReviewed by PanPotPlates Editorial TeamPublished Apr 8, 2026 · Updated May 11, 2026
Mediterranean 160 mins slowcookeronepotpescatarianfreezablehealthyeasyfamily-friendlyglutenfreedairyfreeweeknightlightflavorfulmediterraneanseafoodfish recipeslow cooker fish

Enjoy a hassle-free, healthy slow cooker recipe with cod fillets encrusted in lemon, garlic, and fresh Mediterranean herbs. This gluten-free, dairy-free pescatarian dish is perfect for an easy weeknight family dinner that's light, flavorful, and nutritious.

Slow Cooker Herb-Crusted Cod with Lemon and Garlic
Prep 10 min
Cook 150 min
Total 160 min
Servings 4
Difficulty easy
Cuisine Mediterranean

Recipe Details

Prep10 min
Cook150 min
Total160 min
Servings4
Difficultyeasy
CuisineMediterranean
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Ingredients

Servings 4
  • 4 cod fillets (about 6 ounces each), skin removed
  • 2 tablespoons olive oil
  • 4 garlic cloves, minced
  • Zest and juice of 1 lemon
  • 2 tablespoons fresh parsley, finely chopped
  • 1 tablespoon fresh dill, finely chopped
  • 1 teaspoon dried oregano
  • 1/2 teaspoon salt
  • 1/2 teaspoon black pepper
  • 1/4 teaspoon crushed red pepper flakes (optional)
  • 1/2 cup vegetable broth
  • 1 small onion, thinly sliced
  • 1 cup cherry tomatoes, halved
  • 1/2 cup thinly sliced bell peppers (any color)

Instructions

  1. In a small bowl, whisk together olive oil, minced garlic, lemon zest and juice, parsley, dill, dried oregano, salt, black pepper, and crushed red pepper flakes (if using) to create the herb-lemon garlic crust mixture.
  2. Arrange the sliced onion, cherry tomatoes, and bell peppers evenly in the bottom of the slow cooker to form a flavorful vegetable bed.
  3. Pour the vegetable broth over the vegetables in the slow cooker.
  4. Pat cod fillets dry with paper towels. Evenly coat each fillet on all sides with the herb-lemon garlic mixture.
  5. Place the coated cod fillets carefully on top of the vegetable bed in the slow cooker.
  6. Cover and cook on LOW for 2 to 2 1/2 hours, or until the cod is opaque and flakes easily with a fork. Avoid overcooking to maintain tender, moist fish.
  7. Using a wide spatula, gently lift the cod fillets from the slow cooker and arrange on serving plates. Spoon the cooked vegetables and pan juices over or alongside the fish.
  8. Serve immediately with steamed greens, quinoa, or gluten-free crusty bread for a complete meal.
  9. Store leftovers in an airtight container in the refrigerator for up to 3 days or freeze for up to 1 month.

Frequently Asked Questions

Reader questions and answers for this recipe will appear here.

Customize this Slow Cooker One-Pot pescatarian recipe by substituting ingredients to suit your diet or availability:

  • Cod fillets: Swap with other mild white fish like haddock, tilapia, or halibut for similar texture and flavor.
  • Olive oil: Use avocado or grapeseed oil for a neutral alternative.
  • Fresh herbs: Substitute parsley and dill with basil, cilantro, or thyme depending on preference and seasonality.
  • Lemon zest and juice: Lime zest and juice provide a bright citrus twist.
  • Vegetable broth: Low-sodium chicken or homemade broth can be used to adjust flavor and sodium if not strictly vegetarian.
  • Bell peppers and cherry tomatoes: Replace with zucchini, yellow squash, or mushrooms for lower-carb or seasonal variations.
  • Onion: Shallots or leeks offer a milder or sweeter flavor.

These swaps keep the dish healthy, gluten-free, dairy-free, family-friendly, and flavorful while ensuring simple slow cooker preparation and maintaining a weeknight-friendly profile.

Pan Or Pot Required

For this recipe, a slow cooker is the essential cookware that ensures perfectly tender, herb-crusted cod with minimal hands-on time. Slow cookers provide gentle, even heat that delicately cooks the fish while melding fresh herbs, zesty lemon, and fragrant garlic flavors without drying out the cod.

This Slow Cooker One-Pot meal requires no additional pans beyond your slow cooker insert. Simply layer the fresh vegetables, pour in vegetable broth, then place the seasoned cod fillets on top for an effortless, family-friendly cooking experience. The slow cooker method also simplifies meal prep and cleanup—ideal for quick weeknight dinners or nutritious meal prep with delicious leftovers.

Using a slow cooker supports the recipe’s healthy, gluten-free, and dairy-free profile and is a real timesaver for busy households aiming for a flavorful, light, and hearty pescatarian meal. A wide spatula is recommended for gently lifting the delicate cod fillets from the cooker.

Cookware Size Guidance

A 4 to 6-quart slow cooker is optimal for this Slow Cooker Herb-Crusted Cod with Lemon and Garlic. This size comfortably fits 4 cod fillets along with the vegetable bed and broth, ensuring even heat distribution and preventing overcrowding for best cooking results.

Using a 4-6 quart slow cooker is ideal when serving 4 people, allowing space to layer ingredients without spills or uneven cooking. Smaller slow cookers may cause overcrowding and inconsistent texture, whereas larger slow cookers could dry out the fish or speed up cooking.

If your slow cooker size varies slightly, opt for the closest capacity within this range to maintain the intended cooking method. For easier cleanup, choose a model with a removable ceramic insert if available.

Cookware Swap Guidance

This recipe is designed for a slow cooker one-pot approach to lock in moisture and deliver tender, flavorful cod with minimal active cooking. If you lack a slow cooker, here are alternative cookware methods that maintain the recipe's qualities:

  • Instant Pot (Instant Pot Recipes & One-Pot): Use the sauté function to prepare the herb crust and cook vegetables, then use the steam or slow cook settings to gently cook the cod for similar moist, flaky results with a timesaver advantage.
  • Oven Casserole Dish (Casseroles): Layer vegetables and seasoned cod in a shallow baking dish, cover tightly with foil, and bake at 325°F (163°C) for 25-30 minutes or until fish flakes easily. This works well for a family-friendly, healthy weeknight meal.
  • Covered Skillet or Sauté Pan (Skillet Meals & One-Pan): Cook vegetables gently with broth, add cod on top, cover tightly, and simmer on low heat until the fish is tender and flaky, preserving the recipe’s light, easy, and flavorful characteristics.

To keep the dish gluten-free, dairy-free, and pescatarian, avoid methods requiring incompatible ingredients (e.g., butter-heavy searing). Use cookware that delivers gentle, even heat to maintain the cod’s delicate texture.

These alternatives preserve the recipe’s healthy, family-friendly, and flexible nature regardless of your kitchen setup or preferred cooking method.

Leftovers Quality

This Slow Cooker Herb-Crusted Cod with Lemon and Garlic stores well. Transfer leftovers into an airtight container and refrigerate within two hours to keep freshness and ensure food safety. Refrigerated leftovers stay good for up to 3 days.

For longer storage, freeze leftovers in freezer-safe containers or bags with excess air removed. Frozen portions maintain quality for up to 1 month.

Reheat refrigerated servings gently in the microwave at medium power or a covered skillet over low heat to prevent drying the delicate fish. Thaw frozen leftovers overnight in the refrigerator before reheating. Avoid reheating at high temperatures or prolonged times to keep the cod tender and flaky.

Following these storage and reheating tips lets you extend your enjoyment of this healthy, family-friendly slow cooker meal and minimize food waste, perfect for easy weeknight dinners or meal prep.

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