Let's say she wants to play with crayons when it's time to eat. If she starts throwing a tantrum, I lie her down on the ground and don't pay attention to her, except to say "we will hug and go get your fruit when you are calm". When the tantrum is finished, I ask her "are you calm?" and if she says yes, we hug, I clean her up, and give her the fruit.

Until she calms down, I don't pay attention to her, except to re-iterate that she will have more stiumulus once she is calm.