What cookware works best?

Use a pan or pot named in the recipe and avoid crowding so the recipe cooks evenly.

How do I know it is done?

Follow the recipe timing, then check the main ingredient for tenderness, bubbling, browning, or safe doneness before serving.

Can I adjust the seasoning?

Yes. Taste near the end and adjust salt, acid, herbs, or heat in small amounts.

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One-Pan Chicken

One-Pan Cajun-Spiced Seared Tuna with Sautéed Greens

Name: One-Pan Cajun-Spiced Seared Tuna with Sautéed Greens
Prep time: 10 min
Cook time: 15 min
Total time: 25 min
Yield: 4 servings
Cuisine: Cajun-American
Ingredients: 4 tuna steaks (about 6 ounces each, 1-inch thick); 2 tablespoons olive oil, divided; 1 tablespoon Cajun seasoning (store-bought or homemade blend); 3 garlic cloves, minced; 1 small onion, thinly sliced; 5 cups kale, ribs removed and chopped; 3 cups fresh spinach; 1/4 cup low-sodium vegetable broth or water; Salt and freshly ground black pepper, to taste; Lemon wedges, for serving

By PanPotPlates Test KitchenReviewed by PanPotPlates Editorial TeamPublished Apr 9, 2026

Cajun-American 25 mins onepanquickeasyhealthypescatarianhighproteinlowcarblightweeknightflavorfulfamily-friendly

This easy one-pan Cajun-spiced seared tuna recipe combines protein-rich tuna steaks with a flavorful spice rub, cooked alongside vibrant sautéed kale and spinach. A healthy, low-carb, and pescatarian-friendly dinner ideal for quick weeknight meals and family dining.

One-Pan Cajun-Spiced Seared Tuna with Sautéed Greens

Prep 10 min

Cook 15 min

Total 25 min

Servings 4

Difficulty easy

Cuisine Cajun-American

Ingredients

Servings 4

4 tuna steaks (about 6 ounces each, 1-inch thick)
2 tablespoons olive oil, divided
1 tablespoon Cajun seasoning (store-bought or homemade blend)
3 garlic cloves, minced
1 small onion, thinly sliced
5 cups kale, ribs removed and chopped
3 cups fresh spinach
1/4 cup low-sodium vegetable broth or water
Salt and freshly ground black pepper, to taste
Lemon wedges, for serving

Ingredients for One-Pan Cajun-Spiced Seared Tuna with Sautéed Greens

Instructions

Pat the tuna steaks dry with paper towels. Rub both sides evenly with Cajun seasoning, pressing lightly to adhere.
Heat 1 tablespoon olive oil in a large non-stick skillet over medium-high heat until shimmering.
Add the tuna steaks and sear for 2-3 minutes on each side for medium-rare doneness (adjust cooking time for preferred doneness). Remove the tuna from the pan and set aside, loosely tented with foil.
Reduce heat to medium and add the remaining 1 tablespoon olive oil to the skillet.
Add the sliced onion and minced garlic; sauté for 2-3 minutes until fragrant and softened.
Add the chopped kale and sauté for 3-4 minutes until it begins to wilt.
Add the fresh spinach and vegetable broth, stirring to combine. Cook for another 2-3 minutes until all greens are tender but still vibrant.
Season the greens with salt and pepper to taste. Return the tuna steaks to the pan with the greens just to warm through for about 1 minute.
Serve immediately with lemon wedges on the side for squeezing over the tuna and greens.

One-Pan Cajun-Spiced Seared Tuna with Sautéed Greens cooking in the recommended pan or pot

Tips

Pan Or Pot Required

This recipe is designed as a one-pan meal , perfect for quick, easy, and minimal cleanup dinners.

Cookware Size Guidance

A 12-inch (30 cm) non-stick skillet or sauté pan is optimal for this recipe, offering sufficient surface area to sear all four tuna steaks evenly without overcrowding, which preserves their texture and flavor.

Cookware Swap Guidance

e-pan Cajun-spiced seared tuna recipe, suitable cookware alternatives can help you achieve great results while keeping cooking quick, easy, and healthy: Cast Iron Skillet: Offers excellent high-heat retention and searing.

Leftovers Quality

Reheat gently and add a splash of liquid when needed to keep the texture moist and tender.

Frequently Asked Questions

Can I make One-Pan Cajun-Spiced Seared Tuna with Sautéed Greens ahead?: Yes. Prep the ingredients or cook the full dish ahead, then reheat gently so the texture stays close to freshly made.
What cookware works best?: Use a pan or pot named in the recipe and avoid crowding so the recipe cooks evenly.
How do I know it is done?: Follow the recipe timing, then check the main ingredient for tenderness, bubbling, browning, or safe doneness before serving.
Can I adjust the seasoning?: Yes. Taste near the end and adjust salt, acid, herbs, or heat in small amounts.

Customize this One-Pan Cajun-Spiced Seared Tuna with Sautéed Greens to your dietary needs or pantry by trying these substitutions while maintaining its quick, easy, and flavorful appeal:

Tuna Steaks: Replace with swordfish or salmon fillets for alternative pescatarian options. For a vegetarian twist, use thick grilled eggplant or portobello mushroom slices seasoned with Cajun spices.
Cajun Seasoning: In absence of a blend, combine smoked paprika, garlic powder, thyme, and cayenne pepper individually.
Olive Oil: Swap with avocado or grapeseed oil for neutral flavor and high smoke point.
Vegetable Broth: Use water with a splash of lemon juice or white wine for brightness and lower sodium.
Kale and Spinach: Substitute Swiss chard, collards, or mustard greens based on preference or seasonality.
Onion and Garlic: Substitute shallots for a milder taste or use garlic-infused oil to accommodate sensitive palates.

These adjustments keep the dish aligned with its healthy, high-protein, low-carb, and pescatarian-friendly profile, ensuring a flexible, light, and family-friendly one-pan meal.

Storage and Reheating

Cool One-Pan Cajun-Spiced Seared Tuna with Sautéed Greens before storing. Refrigerate leftovers in an airtight container for up to 4 days.

Freeze portions for longer storage when the ingredients are freezer-friendly. Reheat gently with a splash of liquid if the dish looks dry.

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One-Pan Cajun-Spiced Seared Tuna with Sautéed Greens

Recipe Details

Ingredients

Instructions