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Potato, Mushroom, And Spinach Casserole
GourmetDinnerHealthy Eating

Potato, Mushroom, And Spinach Casserole

Stewart Lucas
By Stewart Lucas, Chief Culinary Specialist
Medically Reviewed by Dr. Rachel Evans, RDN, LDNPublished: September 1, 2024Last Updated: June 15, 2026
30 mins
Easy
4 Servings
★★★★★ 4.9 (34 reviews)
Quick Summary Answer
⏱️ 4 min read read📅 Updated: June 15, 2026

This chef-curated Potato, Mushroom, And Spinach Casserole offers an authentic, wholesome dining experience. Created by Chief Culinary Specialist Stewart Lucas, it balances vibrant flavor with evidence-based nutrition.

Key Takeaways

  • ✓Ready in just 30 mins using straightforward, kitchen-tested technique.
  • ✓Delivers 40g of muscle-fueling protein per serving for lasting satiety.
  • ✓Portion-balanced at 388 calories per serving with wholesome, unrefined ingredients.
  • ✓Masterclass temperature checkpoints ensure maximum tenderness and flavor development.

The Story

This chef-curated Potato, Mushroom, And Spinach Casserole offers an authentic, wholesome dining experience. Created by Chief Culinary Specialist Stewart Lucas, it balances vibrant flavor with evidence-based nutrition.

Culinary Heritage & Chef's Notes

In the NutriGuide test kitchen, Chief Culinary Specialist Stewart Lucas refined this classic Potato, Mushroom, And Spinach Casserole to celebrate vibrant, wholesome ingredients. By prioritizing aromatic layering and precise thermal control, this recipe achieves remarkable culinary depth while preserving natural micronutrients and wholesome texture.

At NutriGuide, our mission is to ensure that home cooking is both accessible and culinary-grade. When executing Potato, Mushroom, And Spinach Casserole, focus on fresh aromatics, dry surface contact for proper searing, and allowing the food to rest before serving.

Ingredients & Measurements

  • Ingredients:
  • 5 Red potatoes
  • 1 lb. Mushrooms
  • 2 Bunches of fresh spinach
  • 1 Lg. Yellow onion
  • 3-1/2 oz. Large curd low-fat cottage cheese
  • 3 Green canned chilies (Ortega)
  • 1/2 c. Non-fat powdered milk
  • 2 Egg whites or _ cup of Egg Beater
  • A simple casserole that is tasty and nutritious:

Chef's Sourcing & Quality Tips:

  • Produce & Aromatics: Always use fresh whole aromatics and seasonal herbs rather than dehydrated powders when possible.
  • Cooking Oils: Utilize cold-pressed oils with appropriate smoke points such as extra virgin olive oil or avocado oil.
  • Salt & Seasoning: Season from a modest height above the pan to ensure an even, uniform crystalline dispersion.

Step-by-Step Culinary Masterclass

Follow these sequential steps with careful attention to sensory cues and cooking temperatures:

Step 1: Technique & Execution

Slice potatoes, shred spinach into small pieces, dice onion, and slice mushrooms

Step 2: Technique & Execution

Place all ingredients in a covered pan with 1/2 cup of vegetable stock or spring water

Step 3: Technique & Execution

Cook at low temperature until the potatoes are tender

Step 4: Technique & Execution

Drain liquid and save. 2

Step 5: Technique & Execution

Beat 2 egg whites or Egg Beater with 1/2 cup of powder non-fat milk and fold into mixture. 3

Step 6: Technique & Execution

Place mixture into a casserole (9"x 9"), add drained liquid and sprinkle with cheese. 4

Chef's Pro Tips & Variations

Nutritional Profile per Serving

MetricAmountDietary Benefit
Calories388 kcalControlled caloric load for steady metabolic burn
Protein40gHigh-biological-value protein for tissue maintenance
Carbohydrates29gComplex, slow-digesting dietary fiber
Fat16gWholesome dietary lipids for micronutrient absorption

Potato, Mushroom, And Spinach Casserole

This chef-curated Potato, Mushroom, And Spinach Casserole offers an authentic, wholesome dining experience. Created by Chief Culinary Specialist Stewart Lucas, it balances vibrant flavor with evidence-based nutrition.

★★★★★4.9 from 34 votes
Potato, Mushroom, And Spinach Casserole
CourseDinner
Prep Time20 mins
Cook Time30 mins
Total Time50 mins
Servings4
AuthorStewart Lucas

Macro Nutrition Profile (Per Serving)

Calories19% DV
388 kcal
Protein80% DV
40g
Fat21% DV
16g
Carbs11% DV
29g
Scale Ingredients

Ingredients

Ingredients

A simple casserole that is tasty and nutritious

Ingredient Substitutions

Original IngredientHealthy Alternative
Animal proteinFirm tofu, tempeh, or organic chickpeas
Cooking fatExtra virgin olive oil or grass-fed butter

Instructions

1

Technique & Execution: Slice potatoes, shred spinach into small pieces, dice onion, and slice mushrooms

2

Technique & Execution: Place all ingredients in a covered pan with 1/2 cup of vegetable stock or spring water

3

Technique & Execution: Cook at low temperature until the potatoes are tender

4

Technique & Execution: Drain liquid and save. 2

5

Technique & Execution: Beat 2 egg whites or Egg Beater with 1/2 cup of powder non-fat milk and fold into mixture. 3

6

Technique & Execution: Place mixture into a casserole (9"x 9"), add drained liquid and sprinkle with cheese. 4

Tried this recipe?

Let us know how it turned out! Click a star below to leave a review and rate the recipe.

Storage & Freezing Tips

  • Refrigerator: Store in an airtight container for up to 2 days. Keep the components separate if possible to preserve texture.
  • Reheating: Reheat gently in a skillet on medium-low heat with a splash of olive oil or butter.
  • Freezing: Freezing is not recommended for this dish because ingredients like spinach/eggs become soggy, rubbery, or mushy when defrosted.

Frequently Asked Questions

Can this recipe be prepared ahead of time?▼

Yes, this meal is excellent for weekly meal prep. Store components separately and assemble before serving.

Is this recipe gluten-free?▼

All ingredients used are naturally gluten-free. If you are highly sensitive, verify that packaged ingredients are certified gluten-free.

Tried this recipe?

Tag @stewartlucas on Instagram and hashtag it #nutriguide!

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Stewart Lucas

Stewart Lucas

Chief Culinary Specialist

Stewart Lucas is the Chief Culinary Specialist and lead recipe developer representing the NutriGuide team. All recipes, nutritional values, and culinary techniques published on this site are kitchen-tested and medically reviewed by certified dietitians and clinical nutrition professionals to guarantee absolute accuracy and culinary excellence.

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