7 1 1 BBQ rice can be heated in the oven. According to the 360 question and answer, 7 1 1 rice in convenience store can be heated in the oven, but it should be preheated for about five minutes before using the oven to avoid uneven heating of food. It is best to add a little water to the lunch box to prevent the food from drying and affecting eating. So 7 1 1 barbecue rice can be heated in the oven.