I was saying that my child could not have something else instead of the meal offered until she had tasted it. That means she puts some food on a spoon and puts it in her mouth. Once she has done that she can have all the fruit she likes afterwards
Sounds like the 50s (I was there, and remember).
What are you proving by making her put the spoon in her mouth, OP? Is it that you hope she'll say "Mm...delicious" and finish it up? If you've found that does happen on occasion, then I understand why you're determined to keep to your rules.
However, I also remember being at an aunt's house where my mother insisted I "try to eat a mouthful" of stewed apples. I gagged, felt sick and hot, and panicked. Incidents such as that have left their mark 60 years on. I still occasionally feel apprehensive eating out.
If I'd had a big lunch and someone told me I couldn't have a light supper (fruit) without putting a spoonful of fish/steak/cheese in my mouth first, I might well feel upset.
It really isn't worth it, you know. Food is just fuel. One of my four was a "poor eater" - serve me right, because I thought all I had to do was cook a selection of healthy, nourishing dishes, make sure the child was well exercised - and he'd eat. Seemed to work for my first (and my third and fourth) but from weaning, my second boy had likes and dislikes. Sure, it was inconvenient; it was embarrassing on occasion (unsympathetic granny) but we went along with it. I compromised, made it no big deal, and as an adult, he eats a wide variety of foods.