Just remember, keep up your exercise. By the time people reach adulthood their caloric need starts to decline. But at any age, the important thing is to eat a variety of foods for your nutritional needs - just eat less of them as you get older. Not knowing exactly when your holiday started, it's hard to say how long it will take to lose the weight. You might want to knock your exercise up a notch and remember not to go on a very low-calorie diet, because that makes your body burn calories more slowly.
Starches are another name for carbohydrates.
They provide the basic fuel for your body and are essential for energy. Therefore, enjoy your bananas and your potatoes. Both of these provide other nutrients as well. This emphasizes how important it is to eat a good breakfast, a balanced lunch, and a lighter dinner. Yes, you should eat lighter fare at supper.