Grilled flank steak, portobello and green bean salad Recipe | Food Network UK

Ingredients

• 60ml olive oil
• 80ml balsamic vinegar
• 2 tbsp orange juice
• 1 tbsp minced garlic
• 1/2 tsp chilli flakes
• 1/2 tsp salt
• 1/2 tsp fresh ground black pepper
• 560g flank steak, trimmed of all visible fat
• 4 large portobello mushroom caps, wiped clean with kitchen paper
• 1 tbsp water
• 2 tsp Dijon mustard
• 340g French beans, trimmed
• 140g baby spinach leaves
• 4 vine-ripened tomatoes, each sliced into 8 wedges
• 1/2 small red onion, thinly sliced