Beef, Pepper & Mushroom Kabobs

• 12 mushrooms
• 1 bell pepper
• 450 gr beef sirloin steak
• 85 gr long (grain)
• 16 ml p lemon juice (fresh)
• 16 ml p water
• 16 ml p olive oil
• 10 ml dijon-style mustard
• 5 ml honey
• 1 gr salt