Tell your girlfriend eating 6-8 small meals will keep her more petite then one large meal. Body just goes into starvation mode and stores whatever it holds.

Wow a lot of you seem like you rely strictly on carb. Don't forget proteins and healthy fats. Fats are good for you. It seems like man of our macronutrient ratios are 85% carb, 10% protein, 5% fat. hehe.