High-Protein Tuscan White Fish Casserole: 42g Protein Per Serving

If you’re serious about body composition, you know that protein isn’t negotiable. This Tuscan white fish casserole delivers a massive 42 grams of protein per serving while keeping calories reasonable and satiety sky-high. It’s the kind of meal that works whether you’re in a deficit chasing fat loss or maintaining muscle during a cut.

Cod, halibut, or sea bass become the foundation here—lean, clean protein that absorbs Italian herbs and sun-dried tomato flavor without any of the caloric bloat. Add in spinach, white beans, and a light cream sauce, and you’ve got a casserole that actually tastes indulgent while supporting your goals.

Why This Recipe Works for Men’s Body Composition

White fish is criminally underrated in the muscle-building conversation. At roughly 20g of protein per 100g serving, it’s as efficient as chicken breast with a completely different flavor profile—meaning you won’t get bored rotating it into your meal prep. The combination of protein + fiber (from spinach and beans) + healthy fats (from olive oil and fish) keeps you fuller longer, making calorie adherence easier on a cut.

The casserole format also matters for practical nutrition. You’re cooking everything together, which means better flavor integration, fewer dirty dishes, and built-in portion control when meal prepping for the week.

Ingredients (Serves 4)

• 4 cod fillets (6 oz each, about 24 oz total)
• 2 cups fresh spinach
• 1 can (15 oz) white beans, drained and rinsed
• 1 cup sun-dried tomatoes (oil-packed, drained)
• 4 cloves garlic, minced
• 1 cup low-sodium chicken or vegetable broth
• ½ cup heavy cream (or full-fat Greek yogurt for lower calories)
• 3 tbsp extra-virgin olive oil
• 2 tsp dried Italian seasoning
• 1 tsp dried basil
• ½ tsp red pepper flakes
• Salt and black pepper to taste
• ¼ cup grated Parmesan cheese
• Fresh lemon juice (½ lemon)

Step-by-Step Instructions

Step 1: Prep and Preheat
Preheat your oven to 400°F. Pat the cod fillets dry with paper towels—this is critical for better texture. Arrange them in a single layer in a 9×13 casserole dish.

Step 2: Build the Sauce Base
Heat 2 tbsp olive oil in a large skillet over medium heat. Add minced garlic and cook for 60 seconds until fragrant. Add sun-dried tomatoes, white beans, and spinach. Stir continuously for 2-3 minutes until spinach wilts and everything is well combined.

Step 3: Add Aromatics and Broth
Pour in the broth and add Italian seasoning, basil, and red pepper flakes. Simmer for 3 minutes, allowing flavors to meld. Remove from heat and stir in the heavy cream (or Greek yogurt). Taste and adjust seasoning with salt, pepper, and lemon juice.

Step 4: Combine and Bake
Pour the sauce mixture evenly over the cod fillets. Drizzle with remaining 1 tbsp olive oil and sprinkle Parmesan on top. Bake for 12-15 minutes until the fish is opaque and flakes easily with a fork. The internal temperature should reach 145°F.

Step 5: Rest and Serve
Let the casserole rest for 2 minutes before serving. This prevents the fish from drying out further.

Macro Breakdown Per Serving

• Calories: 385
• Protein: 42g
• Carbohydrates: 18g
• Fat: 16g
• Fiber: 4g

This macro profile is ideal for a fat-loss phase—high protein to preserve muscle, moderate carbs from beans and tomatoes, and enough fat to support hormone production and satiety.

Pro Tips for Maximum Results

Meal Prep Strategy: Make this on Sunday and portion into four containers. It keeps refrigerated for 4 days. Pro move: store the fish and sauce separately to prevent sogginess, then combine when heating.

Calorie Adjustments: For a cut, swap heavy cream for full-fat Greek yogurt (saves ~30 calories and adds protein). For a maintenance or bulk phase, increase to 7 oz cod fillets per serving and add ½ cup cooked pasta or rice on the side.

Flavor Variations: Swap cod for halibut, sea bass, or even salmon. Add capers or fresh basil in the final minute for extra brightness. A squeeze of balsamic vinegar at the end elevates the depth.

Satiety Hack: Pair this with a large green salad dressed in vinaigrette. The added fiber and volume extends fullness without meaningfully impacting macros.

Storage: Portion into airtight containers immediately after cooking. Freezes well for up to 2 months—thaw overnight in the fridge before reheating in a 350°F oven for 8-10 minutes.

The Bottom Line

This isn’t a “diet” recipe that tastes like deprivation. It’s a genuinely delicious meal that happens to align perfectly with lean body composition goals. Forty-two grams of protein, real food, minimal processing, and the kind of flavor that makes you look forward to meal prep instead of dreading it.

Inspired by content from Diet Doctor (https://www.dietdoctor.com/recipes/tuscan-cod-casserole)