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!
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Recipe Information
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
Instructions
Heat 1 tablespoon of olive oil and 1 tablespoon of butter in a large skillet over medium heat.
Add the sliced yellow onion to the skillet and cook for 8-10 minutes, stirring occasionally, until the onions are soft and caramelized.
Add the sliced mushrooms to the skillet and cook for another 5-7 minutes until they release their moisture and start to brown.
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.
Toast the whole-grain bread slices lightly, either in a toaster or on a dry skillet.
Spread 1 tablespoon of mayonnaise on each of two slices of bread.
On the mayonnaise-coated slices, layer the mushroom, onion, and spinach mixture evenly.
Top the mixture with one slice of provolone cheese per sandwich.
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).
Cut each sandwich in half and serve warm.
Nutrition Facts
Calories |
632 | ||
|---|---|---|---|
% Daily Value* |
|||
| Total Fat | 40.3 g | 52% | |
| Saturated Fat | 12.3 g | 61% | |
| Polyunsaturated Fat | 0.0 g | ||
| Cholesterol | 41 mg | 14% | |
| Sodium | 1185 mg | 52% | |
| Total Carbohydrate | 50.2 g | 18% | |
| Dietary Fiber | 8.5 g | 30% | |
| Total Sugars | 9.9 g | ||
| Protein | 20.4 g | 41% | |
| Vitamin D | 0.3 mcg | 2% | |
| Calcium | 353 mg | 27% | |
| Iron | 4.7 mg | 26% | |
| Potassium | 451 mg | 10% | |
*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.
