Sautéed Spinach and Mushroom Egg White Omelette

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

A light and nutritious egg white omelette filled with tender sautéed spinach and earthy mushrooms, ideal for a healthy brunch. This american-inspired brunch (vegetarian) ready in about 18 minutes combines egg whites, baby spinach leaves, button mushrooms, sliced into a breakfast that fuels the morning without the midday crash — make-ahead-friendly and balanced enough to anchor the first meal of the day. Each serving lands at about 180 calories and feeds 2, so it sits comfortably in a weekly breakfast rotation alongside fruit, yogurt, or coffee. 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 (14 ratings) Prep: 8 min Cook: 10 min Serves 2 American cuisine 180 cal/serving
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Ingredients

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Instructions

  1. Step 1: Heat 1 tbsp olive oil in a non-stick skillet over medium heat. Add 1 cup sliced button mushrooms and sauté for 4-5 minutes until soft and lightly browned.
  2. Step 2: Add 2 cups baby spinach leaves to the skillet with the mushrooms and cook for another 2 minutes until the spinach is wilted. Season with 1/4 tsp salt and 1/8 tsp black pepper. Remove the vegetable mixture from the skillet and set aside.
  3. Step 3: In a clean bowl, whisk 6 large egg whites until slightly frothy.
  4. Step 4: Reduce the skillet heat to medium-low and pour in the egg whites, swirling the pan to create an even layer.
  5. Step 5: Cook the egg whites gently for 2-3 minutes until they start to set but the top is still slightly runny.
  6. Step 6: Spoon the spinach and mushroom mixture evenly over one half of the omelette and sprinkle 2 tbsp grated Parmesan cheese on top.
  7. Step 7: Using a spatula, carefully fold the omelette over the filling and cook for another 1-2 minutes until the cheese melts and the egg whites are fully set.
  8. Step 8: Slide the omelette onto a plate and garnish with 1 tbsp chopped fresh chives before serving.

Frequently asked questions

How long does Sautéed Spinach and Mushroom Egg White Omelette take to make?

Total time is about 18 minutes (8 min prep + 10 min cook). Most home cooks find this fits comfortably into a busy morning; prep components the night before to save active time.

How do I store leftover Sautéed Spinach and Mushroom Egg White Omelette?

Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat in the microwave or oven; egg- or grain-based items may need a splash of milk or water to refresh texture. Cold-served items (overnight oats, smoothies) keep 2–3 days in the fridge.

Can I substitute ingredients in Sautéed Spinach and Mushroom Egg White Omelette?

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 Sautéed Spinach and Mushroom Egg White Omelette 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.

Is Sautéed Spinach and Mushroom Egg White Omelette vegetarian?

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

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