For instance, Victoria, my younger one, used to eat avocados. Could eat almost an entire one on her own. Now? she won't touch it. However, she is more willing to try new things than my older daughter is.
When grocery shopping, we picked up some sandwich meat for daddy - oven roasted turkey. They both expressed interest in eating that. So, I promised them they could have some if they finished their hot and sour soup served with rice.
As I've said before, I am a woman of my word. Sandwich meat tends to be a bit salty, since it's made to consumed between two pieces of bread; so I split one piece between the two girls. Isabella, the older daughter, was up to trying it between two pieces of bread. Proud of her for trying something new (turkey sandwich meat) in a new way (between two pieces of bread).
Now, if I had lathered the bread with some foreign object, like mayonnaise or ketchup, that would have been a different story. A meltdown or a full blow tantrum would have been highly likely. Anyways, her first sandwich.