Mushroom Onion and Spinach Sandwich

Elevate your sandwich game with this delectable Mushroom Onion and Spinach Sandwich! Packed with earthy mushrooms, sweet caramelized onions, and tender baby spinach, this recipe creates a perfectly balanced filling that’s rich in flavor and nutrients. A dash of balsamic vinegar adds a tangy twist, while provolone cheese melts into gooey perfection to bind the layers together. Served on lightly toasted whole-grain bread with a smear of creamy mayonnaise, this sandwich is satisfying and wholesome. Whether enjoyed as a quick lunch or a comforting dinner, this vegetarian delight is easy to make in just 30 minutes and sure to impress. Perfect for those seeking a flavorful, veggie-packed sandwich experience!

Nutriscore Rating: 65/100

Prep Time:10 mins

Cook Time:20 mins

Total Time:30 mins

Servings: 2

Ingredients

• 2 tablespoons olive oil
• 1 tablespoon butter
• 1 medium (sliced) yellow onion
• 1.5 cups (sliced) mushrooms
• 2 cups baby spinach
• 2 cloves (minced) garlic
• 1 teaspoon balsamic vinegar
• 0.5 teaspoon salt
• 0.25 teaspoon black pepper
• 4 slices whole-grain bread
• 2 tablespoons mayonnaise
• 2 slices provolone cheese

Directions

Step 1

Heat 1 tablespoon of olive oil and 1 tablespoon of butter in a large skillet over medium heat.

Step 2

Add the sliced yellow onion to the skillet and cook for 8-10 minutes, stirring occasionally, until the onions are soft and caramelized.

Step 3

Add the sliced mushrooms to the skillet and cook for another 5-7 minutes until they release their moisture and start to brown.

Step 4

Stir in the minced garlic, baby spinach, balsamic vinegar, salt, and black pepper. Cook for 2-3 minutes until the spinach is wilted. Remove from heat and set aside.

Step 5

Toast the whole-grain bread slices lightly, either in a toaster or on a dry skillet.

Step 6

Spread 1 tablespoon of mayonnaise on each of two slices of bread.

Step 7

On the mayonnaise-coated slices, layer the mushroom, onion, and spinach mixture evenly.

Step 8

Top the mixture with one slice of provolone cheese per sandwich.

Step 9

Close each sandwich with the remaining slices of bread and, if desired, press them lightly in a heated skillet or sandwich press until the bread is golden and the cheese has melted (optional).

Step 10

Cut each sandwich in half and serve warm.

Nutrition Facts

Serving size	(665.5g)

Amount per serving	% Daily Value*
Calories	1299.6

Total Fat 91.6g	0%
Saturated Fat 25.0g	0%
Polyunsaturated Fat 7.0g
Cholesterol 102.9mg	0%
Sodium 2670.1mg	0%
Total Carbohydrate 92.0g	0%
Dietary Fiber 14.3g	0%
Total Sugars 19.6g
Protein 36.4g	0%

Vitamin D 2.2IU	0%
Calcium 592.8mg	0%
Iron 6.9mg	0%
Potassium 1573.8mg	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: 61.6%

Protein: 10.9%

Carbs: 27.5%