recipe beef kebabs

Ingredients 1 1/2 pounds beef sirloin or tenderloin, cut into 1-inch cubes 1 large red bell pepper, cut into 1-inch pieces 1 large green bell pepper, cut into 1-inch pieces 1 large onion, cut into 1-inch pieces 1 cup cherry tomatoes Wooden or metal skewers (if using wooden skewers, soak them in water for 30 minutes to prevent burning) For the marinade: 1/4 cup olive oil 3 tablespoons soy sauce 2 tablespoons lemon juice