Portobello 'Pizza' with Roasted Tomatoes and Herbs

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

A savory mushroom base topped with roasted tomatoes and aromatic herbs, offering a satisfying Whole30 alternative to pizza. This mediterranean-inspired whole30 ready in about 30 minutes pairs portobello mushroom, tomato, olive oil for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 220 calories and feeds 2, so it slots cleanly into a Whole30 week and pairs well with roasted sweet potato or a simple olive-oil salad. 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.

★ 4.0 (8 ratings) Prep: 10 min Cook: 20 min Serves 2 Mediterranean cuisine 220 cal/serving
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Ingredients

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Instructions

  1. Step 1: Preheat oven to 400°F. Place 2 large portobello mushrooms, gill-side up, on a parchment-lined baking sheet. Drizzle with 2 tbsp olive oil and season with 1/4 tsp sea salt.
  2. Step 2: Arrange 4 halved medium tomatoes cut-side down on the baking sheet around the mushrooms. Sprinkle with 2 minced garlic cloves, 1 tsp dried oregano, and 1/4 tsp sea salt.
  3. Step 3: Roast for 20 minutes until mushrooms are tender and tomatoes are softened. Remove from oven and top with 1/4 cup torn fresh basil immediately.

Frequently asked questions

How long does Portobello 'Pizza' with Roasted Tomatoes and Herbs take to make?

Total time is about 30 minutes (10 min prep + 20 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 Portobello 'Pizza' with Roasted Tomatoes and Herbs?

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 portobello mushroom from drying out.

Can I substitute ingredients in Portobello 'Pizza' with Roasted Tomatoes and Herbs?

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 Portobello 'Pizza' with Roasted Tomatoes and Herbs for a different number of people?

The recipe is written for 2 servings. Multiply each ingredient by (your serving target / 2). 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.

What goes well with Portobello 'Pizza' with Roasted Tomatoes and Herbs?

Mediterranean whole30 like this pair well with a compliant starch (roasted sweet potato, cauliflower rice, or plantains), a crisp salad dressed with olive oil and lemon, and sliced fruit. Skip grains, legumes, dairy and added sugar — none of them are Whole30-compliant. Tap "Plan a meal with the AI" to get specific side suggestions.

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