It is good to appreciate the food you eat.
Jenna's father spent an hour making a healthy dinner with lots of vegetables.
Jenna wants to get out of eating her vegetables.
Jenna compliments her father on the meal and sneaks her vegetables to the dog while her parents aren't looking.
Jenna tells her father that the meal looks like a puddle of green puke.
Later that night, the dog throws up the vegetables out on the lawn.
Jenna's dad tells her she can't have dessert if she can't be polite.