Many parents worry about how picky their children are. If given a choice, majority of children will eat junk food. Some children are easier "to warm" up to new foods than others, but parents should never give up serving new and healthy foods.
During meals, everybody has a job: parents to serve a healthy and nutritious meal, and children to eat it! Having a meal structure should help with meal-planning: breakfast, lunch, dinner, snacks in-between, and a bed-time snack. Children have small stomach, thus they fill up quickly. Therefore, frequent, small, and nutritious meals will assure adequate nutrition.
Serve fruits and vegetables with every meal (frozen tend to be less expensive than fresh, but are as nutritious and last longer!), expect that your child eats them. If she fusses because she does not like what you made for lunch, let her leave the table. I guarantee that she will be hungry for the next meal! Kids have an inner ability to regulate how much food they need for growth, so don't worry: your daughter will not let herself starve. To make up for nutritional deficiencies that might arise due to her pickiness, give her a daily multivitamin.