Ultimate Flank Steak Sandwich: Juicy

Ingredients

• 1 lb (450 g) flank steak
• 1/4 cup (60 ml) soy sauce
• 2 tbsp (30 ml) olive oil
• 2 tbsp (30 ml) red wine vinegar
• 2 cloves garlic, minced
• 1 tsp (5 g) ground black pepper
• 1 tsp (5 g) paprika
• Salt to taste
• 1/2 cup (120 ml) mayonnaise
• 1 tbsp (15 ml) lemon juice
• Salt and pepper to taste
• 1 red bell pepper, sliced
• 1 yellow bell pepper, sliced
• 1 medium onion, sliced
• 1 tbsp (15 ml) olive oil
• 4 crusty rolls or baguettes
• Fresh arugula or lettuce (optional)