I would recommend oatmeal as a meal replacement.

First of all, oats are also high-calorie food and you should pick low-fat ones when you buy them.

Secondly, if you eat three meals on time and extra oatmeal, which is ineffective or even counterproductive, it is best to eat in the Games, with low-fat milk and fruit to achieve balanced nutrition. Breakfast and other healthy low-fat food together with dinner available oatmeal meal replacement but lunch is not recommended.

Lastly, control the amount of good food on the line