Beef Kabobs Dijon

Ingredients

• 5 lbs beef sirloin tip, cut into 1 1/2 inch cubes
• 2 large garlic cloves, crushed
• 1 cup vegetable oil
• 1/4 cup soy sauce
• 1/4 cup Worcestershire sauce
• 1/4 cup Dijon mustard
• 1/4 cup fresh lemon juice
• 2 teaspoons ground black pepper
• 2 medium onions, cut into large chunks
• 1 green bell pepper, cut into large chunks
• 1 red bell pepper, cut into large chunks
• 1 yellow bell pepper, cut into large chunks
• 1 lb mixed mushrooms
• 2 pints cherry tomatoes