Creamy Avocado Feta Stuffed Portobellos

By , Test Kitchen Director · Reviewed by AislePrompt Editorial · ·

Hearty portobello mushrooms filled with a rich avocado-feta mixture, baked until golden for a satisfying vegetarian keto meal. This mediterranean-inspired vegetarian (keto) ready in about 28 minutes pairs medium, diced avocado, crumbled feta cheese, olive oil for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 320 calories and feeds 4, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 10 min Cook: 18 min Serves 4 Mediterranean cuisine 320 cal/serving
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Ingredients

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Instructions

  1. Step 1: Preheat oven to 400°F. Brush mushroom caps with 1 tbsp olive oil, then place gill-side up on a baking sheet. Season with 1/8 tsp sea salt and 1/4 tsp red pepper flakes.
  2. Step 2: In a bowl, combine 1 diced avocado, 2 oz crumbled feta, 1 tsp chopped dill, and 1/8 tsp sea salt. Spoon mixture evenly into mushroom caps.
  3. Step 3: Bake for 18 minutes until mushrooms are tender and filling is warm, then sprinkle with extra dill. Serve immediately while hot.

Frequently asked questions

How long does Creamy Avocado Feta Stuffed Portobellos take to make?

Total time is about 28 minutes (10 min prep + 18 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.

How do I store leftover Creamy Avocado Feta Stuffed Portobellos?

Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep medium, diced avocado from drying out.

Can I substitute ingredients in Creamy Avocado Feta Stuffed Portobellos?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Creamy Avocado Feta Stuffed Portobellos for a different number of people?

The recipe is written for 4 servings. Multiply each ingredient by (your serving target / 4). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

Is Creamy Avocado Feta Stuffed Portobellos vegetarian?

Yes — this recipe is tagged vegetarian, keto, low carb based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.

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