finished omelet on a plate with toast, top view

Vegetarian Sausage, Mushroom, and Spinach Egg White Omelet

This healthier egg white omelet with vegetarian sausage, spinach, and mushroom, will satisfy you breakfast, lunch or dinner.

Course Breakfast, Main Course
Cuisine vegetarian
Keyword egg white omelet, vegetarian sausage
Prep Time 5 minutes
Cook Time 15 minutes
Total Time 20 minutes
Servings 1 person
Calories 348 kcal
Author Erica


  • 1 tsp extra virgin olive oil
  • olive oil cooking spray
  • 2 oz sliced fresh white button mushrooms
  • 1 MorningStar FarmsĀ® Sausage Patty chopped
  • 2 oz fresh baby spinach leaves
  • 3 egg whites
  • Tbsp freshly shredded parmesan
  • 1 tsp snipped chives
  • 1/4 tsp garlic powder
  • 1/4 tsp kosher salt
  • 1 Tbsp light buttermilk
  • 1 tsp Dijon mustard


  1. Heat the oil a medium nonstick skillet on high heat. Use cooking spray to ensure the skillet is coated. Add the mushrooms and MorningStar FarmsĀ® Sausage and cook over high heat, tossing regularly, until mushrooms and sausage are well browned.
  2. Add the spinach and, using thongs, toss until spinach is nicely wilted. Remove from heat.
  3. In a small bowl, whisk together the egg whites, garlic powder, salt, chives, and parmesan.
  4. In a separate small bowl, stir together the buttermilk and Dijon mustard.
  5. Spray a small nonstick skillet with cooking spray, and heat over medium-high heat. Add the egg white mixture. Top with the mushroom-sausage mixture, spreading evenly over the egg whites.
  6. Cook until egg whites are starting to set (at least half way set), then use a rubber spatula (or two), to fold one side of the egg white disk over the other, to form a half moon shaped omelet.
  7. Allow the omelet to continue cooking, gently turning over once, until cooked through. During this time, you may want to reduce the heat to medium. You just want to get the egg to set.
  8. Drizzle the buttermilk-Dijon sauce over the omelet. Garnish with extra chives (if desired) and serve.

Recipe Notes

In my photos, there is more food than in the recipe listing here. This is because I took these photos when I made this recipe for my entire family. It is easy to multiply and serve more people.