Low Fat Grilled Portobello Sandwich

Savor the perfect balance of flavor and nutrition with this Low Fat Grilled Portobello Sandwich—a delightfully healthy twist on a classic sandwich. Juicy, meaty portobello mushroom caps are marinated in a fragrant blend of balsamic vinegar, olive oil, and garlic, then grilled to perfection for that smoky, charred flavor. Paired with fresh spinach, juicy tomato slices, and sweet red onion, all nestled between toasted whole-grain buns, this sandwich is elevated by a tangy low-fat mayo and Dijon mustard spread. Ideal for quick lunches or light dinners, this recipe is low in fat, packed with plant-based goodness, and ready in just 25 minutes. Whether you're a vegetarian or simply seeking a healthier sandwich option, this grilled portobello burger will leave you feeling satisfied and guilt-free.

Nutriscore Rating: 72/100

Prep Time:15 mins

Cook Time:10 mins

Total Time:25 mins

Servings: 4

Ingredients

• 4 large Portobello mushroom caps
• 2 tablespoons Balsamic vinegar
• 1 teaspoon Olive oil
• 2 cloves Garlic
• 2 tablespoons Low-fat mayonnaise
• 1 tablespoon Dijon mustard
• 4 Whole-grain sandwich buns
• 1 cup Fresh spinach leaves
• 1 large Tomato
• 0.5 Red onion
• 0.25 teaspoon Black pepper
• 0.25 teaspoon Salt

Directions

Step 1

Clean the portobello mushroom caps by wiping them with a damp paper towel. Remove the stems and use a spoon to gently scrape out the gills if desired.

Step 2

In a small bowl, whisk together the balsamic vinegar, olive oil, minced garlic, salt, and black pepper to create the marinade.

Step 3

Place the portobello mushrooms in a shallow dish and pour the marinade over them, ensuring each cap is thoroughly coated. Let the mushrooms marinate for 10-15 minutes.

Step 4

While the mushrooms are marinating, slice the tomato and red onion into thin rounds. Set aside the sandwich toppings, including the fresh spinach leaves.

Step 5

Preheat a grill or grill pan over medium-high heat.

Step 6

Grill the marinated portobello mushrooms for about 4-5 minutes per side, or until tender and slightly charred. Remove from heat.

Step 7

In a small bowl, mix the low-fat mayonnaise and Dijon mustard together to make the sandwich spread.

Step 8

Toast the sandwich buns on the grill for 1-2 minutes until lightly crisped.

Step 9

To assemble the sandwiches, spread the mayonnaise-mustard mixture evenly on the bottom half of each toasted bun. Layer with fresh spinach leaves, grilled portobello mushroom caps, tomato slices, and red onion rounds. Place the top halves of the buns on the sandwiches.

Step 10

Serve immediately and enjoy your low-fat grilled portobello sandwich!

Nutrition Facts

Serving size	(1150.3g)

Amount per serving	% Daily Value*
Calories	1265.7

Total Fat 38.1g	0%
Saturated Fat 5.7g	0%
Polyunsaturated Fat 5.5g
Cholesterol 5.0mg	0%
Sodium 4183.7mg	0%
Total Carbohydrate 204.3g	0%
Dietary Fiber 25.0g	0%
Total Sugars 48.3g
Protein 40.5g	0%

Vitamin D 28.0IU	0%
Calcium 301.7mg	0%
Iron 12.3mg	0%
Potassium 2505.0mg	0%

*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

Source of Calories

Fat: 25.9%

Protein: 12.3%

Carbs: 61.8%