Categories: Burgers, Vegetarian

Ingredients

• 2 tbsp Dijon mustard
• 1 tbsp balsamic vinegar
• 2 large portobello mushrooms
• 2 thick slices beefsteak tomato
• 2 ciabatta rolls, toasted
• 2 slices red onion
• 2 handfuls rocket

Directions

1. Mix the mustard and vinegar together. Brush half of it over the mushrooms and season well. Grill for 2-3 minutes each side. Put the tomato slices on top and grill for a minute.

2. Spread the remaining sauce over the buns then add the tomato and mushroom, tomato side down, followed by the red onion and rocket.

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