Vegetarian Grilled Steak with Caramelized Onions

Savor the hearty goodness of this Vegetarian Grilled Steak with Caramelized Onions, a mouthwatering plant-based twist that's perfect for grilling season. Juicy portobello mushroom caps are marinated in a savory blend of olive oil, balsamic vinegar, soy sauce, garlic, and fresh rosemary, then grilled to perfection for a smoky, steak-like flavor. Topped with deeply golden, buttery caramelized onions infused with a touch of brown sugar, this dish combines rich umami flavors with subtle sweetness. Easy to prepare in under 45 minutes, it’s an ideal meat-free main course that pairs beautifully with bread, a crisp side salad, or your favorite grilled vegetables. Whether you're a vegetarian or just looking to shake up your dinner routine, this recipe promises to be a hit at the table.

Nutriscore Rating: 66/100

Prep Time:15 mins

Cook Time:30 mins

Total Time:45 mins

Servings: 4

Ingredients

• 4 pieces Large portobello mushroom caps
• 4 tablespoons Olive oil
• 2 tablespoons Balsamic vinegar
• 2 tablespoons Soy sauce
• 3 cloves Garlic cloves, minced
• 1 tablespoon Fresh rosemary, chopped
• 1 teaspoon Salt
• 0.5 teaspoon Black pepper
• 2 pieces Large onions, thinly sliced
• 2 tablespoons Butter or margarine
• 1 tablespoon Brown sugar
• 4 slices Bread of choice (optional)

Directions

Step 1

In a shallow dish, combine 2 tablespoons of olive oil, balsamic vinegar, soy sauce, minced garlic, rosemary, salt, and black pepper.

Step 2

Place the portobello mushroom caps in the marinade, ensuring they are evenly coated. Let them marinate for at least 10-15 minutes, flipping once halfway through.

Step 3

While the mushrooms are marinating, heat the remaining 2 tablespoons of olive oil in a large skillet over medium heat.

Step 4

Add the thinly sliced onions to the skillet and cook for about 10 minutes, stirring occasionally until the onions start to soften.

Step 5

Add butter and brown sugar to the onions, and continue to cook, stirring frequently, for another 10-15 minutes until the onions are deeply golden and caramelized. Season with a pinch of salt to taste, then remove from heat.

Step 6

Preheat a grill or grill pan to medium-high heat. Grill the marinated portobello mushroom caps for about 5 minutes on each side until tender and well-marked.

Step 7

Remove the mushrooms from the grill and let them rest for a minute.

Step 8

Serve the grilled portobello 'steaks' with a generous amount of caramelized onions on top. Optionally, serve with slices of bread or a side salad.

Nutrition Facts

Serving size	(1071.0g)

Amount per serving	% Daily Value*
Calories	1337.2

Total Fat 85.1g	0%
Saturated Fat 24.7g	0%
Polyunsaturated Fat 5.3g
Cholesterol 62.9mg	0%
Sodium 4163.7mg	0%
Total Carbohydrate 125.2g	0%
Dietary Fiber 15.4g	0%
Total Sugars 39.3g
Protein 27.8g	0%

Vitamin D 46.3IU	0%
Calcium 224.7mg	0%
Iron 7.4mg	0%
Potassium 2302.2mg	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: 55.6%

Protein: 8.1%

Carbs: 36.3%