A healthy way to introduce new foods to kids is by not letting them realize there trying something new. For example if you put carrots in muffins or pancakes, then your child will never of known they were eating carrots. Then introduce them to the real thing.
Typically a toddler should eat breakfast, lunch, dinner, and a snack somewhere in between. They shouldn't eat anything sugary for a snack. You should prepare a nice healthy snack for them. Kids also shouldn't eat anything after dinner. if they eat a snack a hour or so after dinner then they will still be full of energy and will refuse to go to sleep
Kids should be getting there recommend amount of food from there main food groups: Fruits, Vegetables, Grains, Protein , and dairy. Each day a toddler should be taking in 40 calories for each inch of height. For example a toddler 34 inches should take in 1,360 calories per day. The toddlers serving size should also be about one-quarter of an adults. Some toddler sized meals would be 1-2 tablespoons of vegetables, 1 ounce of meat, and one-quarter of slice breed.