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Grilled Portabellas With Caramelized Onions And
GourmetDinnerHealthy Eating

Grilled Portabellas With Caramelized Onions And

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
★★★★★ 4.8 (54 reviews)
Quick Summary Answer
⏱️ 4 min read read📅 Updated: June 15, 2026

This chef-curated Grilled Portabellas With Caramelized Onions And 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 33g of muscle-fueling protein per serving for lasting satiety.
  • ✓Portion-balanced at 350 calories per serving with wholesome, unrefined ingredients.
  • ✓Masterclass temperature checkpoints ensure maximum tenderness and flavor development.

The Story

This chef-curated Grilled Portabellas With Caramelized Onions And 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 Grilled Portabellas With Caramelized Onions And 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 Grilled Portabellas With Caramelized Onions And, focus on fresh aromatics, dry surface contact for proper searing, and allowing the food to rest before serving.

Ingredients & Measurements

  • Avocados
  • 4 large portabella mushrooms,
  • stems removed
  • 1 medium red onion, peeled and
  • sliced thin
  • 1 tablespoon olive oil
  • 1/2 teaspoon salt and pepper
  • 1 Chilean Hass avocado
  • 4 large hamburger buns
  • Broil or grill mushrooms on both sides until just tender, about 5
  • minutes per side. Sprinkle with salt and pepper.

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

Cook onions in olive oil over medium heat until very tender, stirring occasionally, about 10 to 12 minutes

Step 2: Technique & Execution

Cut avocado in half, remove the pit, and peel and cut into slices

Step 3: Technique & Execution

Top bun bottom with grilled portabella, 1/4 of the onion and avocado slices

Step 4: Technique & Execution

Top with bun top.

Chef's Pro Tips & Variations

Nutritional Profile per Serving

MetricAmountDietary Benefit
Calories350 kcalControlled caloric load for steady metabolic burn
Protein33gHigh-biological-value protein for tissue maintenance
Carbohydrates24gComplex, slow-digesting dietary fiber
Fat11gWholesome dietary lipids for micronutrient absorption

Grilled Portabellas With Caramelized Onions And

This chef-curated Grilled Portabellas With Caramelized Onions And offers an authentic, wholesome dining experience. Created by Chief Culinary Specialist Stewart Lucas, it balances vibrant flavor with evidence-based nutrition.

★★★★★4.8 from 54 votes
Grilled Portabellas With Caramelized Onions And
CourseDinner
Prep Time20 mins
Cook Time30 mins
Total Time50 mins
Servings4
AuthorStewart Lucas

Macro Nutrition Profile (Per Serving)

Calories18% DV
350 kcal
Protein66% DV
33g
Fat14% DV
11g
Carbs9% DV
24g
Scale Ingredients

Ingredients

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: Cook onions in olive oil over medium heat until very tender, stirring occasionally, about 10 to 12 minutes

12:00
2

Technique & Execution: Cut avocado in half, remove the pit, and peel and cut into slices

3

Technique & Execution: Top bun bottom with grilled portabella, 1/4 of the onion and avocado slices

4

Technique & Execution: Top with bun top.

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 leftovers in an airtight container for up to 3-4 days.
  • Reheating: Heat in a saucepan or skillet on medium heat until hot throughout.
  • Freezing: Freeze portions in airtight containers for up to 2 months. Reheat directly from frozen or after thawing.

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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