Sautéed Mushroom and Spinach Egg White Omelette

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

A light and fluffy egg white omelette filled with earthy sautéed mushrooms and fresh spinach, perfect for a healthy brunch. This american-inspired brunch (low carb, vegetarian) ready in about 18 minutes combines egg whites, button mushrooms, fresh spinach leaves 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 140 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.

★ 4.2 (11 ratings) Prep: 8 min Cook: 10 min Serves 2 American cuisine 140 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 they release moisture and turn golden brown.
  2. Step 2: Add 1 cup fresh spinach leaves to the skillet and cook for 1-2 minutes, stirring until wilted. Season the vegetables with 1/4 tsp salt and 1/8 tsp black pepper, then transfer to a plate and set aside.
  3. Step 3: In a bowl, whisk 6 large egg whites with a pinch of salt until slightly frothy.
  4. Step 4: Wipe the skillet clean and return to medium heat. Pour the egg whites evenly into the pan, cooking for about 2 minutes until edges begin to set but the center is still slightly runny.
  5. Step 5: Evenly spread the sautéed mushrooms and spinach over one half of the egg whites, then sprinkle 2 tbsp grated Parmesan cheese on top.
  6. Step 6: Using a spatula, carefully fold the omelette in half and cook for another 1-2 minutes until cheese melts and eggs are fully cooked.
  7. Step 7: Slide the omelette onto a plate and garnish with 1 tbsp chopped fresh chives before serving.

Frequently asked questions

How long does Sautéed Mushroom and Spinach 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 Mushroom and Spinach 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 Mushroom and Spinach 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 Mushroom and Spinach 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 Mushroom and Spinach Egg White Omelette low carb?

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

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