If she's between ages 2-5 you're screwed until she's 5 or 6. It's just a brain thing that happens where foods get tagged as poisonous/gag/yuck/spit it out. Essentially, it makes foods taste like dogpoo that weren't previously classified by the brain as food.
So... my familiy KNOWS about this neurological response, and we all do the "travel the world via food" thing between ages 1&2 to introduce as many foods as possible so the brain will tag them as edible instead of posionous... but INEVITABLY...
- 2nd kids
- 1 of a set of twins or trips
...Don't get the "full treatment". It's because mom/dad get overwhelmed. So #2 or 1/2 or 1/3 of a set end up eating boring stuff for 3 years. It's especially difficult with number 2, or with multiples.
With #2, you've already got #1 set (so people just forget that even though #1 has already had dozens of exposures to 40 herbs and spices, #2 has only had 5 herbs and spices, when was the last, oh, yeesh. THAT long ago? Whoops. It's easy with #1, and by #3 you've got chaos down to a science, but #2 things go sideways. 2 kids are 3 times the work of 1, but 3 are half the work of 2. #4 onward just keeps getting easier and are a LOT LESS work than 1. It's weird kid-math.).
Wiith multiples, they trade. So 1/2 snags all the plain pasta, and 2/2 snags all the sauced pasta. 1/3 and 2/3 snag all the flavorful part of the meal, but 3/3 trade for the bland parts. You end up with 2 or 3 empty plates, but they've divided and conquered so they're only eating what they like best.
DON'T give new foods once the goof has happened UNTIL they're 5 or 6, unless you're feeling brave enough to risk getting an even smaller menu. Just go with boring.
You can try blending foods, but it's 50/50 on whether the brain will accept the new chemical signature, or whether it will reject BOTH, and your list of accepted items gets even smaller.
To know... the response starts right around age 2, and lasts until age 5-6 UNLESS you force foods. If you force a food, the response typically lasts 20+ years.
If you've decided to brave more rejections, however, or they're 5-6 years old...
- Blending (start off with a LOW ratio, like a 1/4 teaspoon instead of 2 tablespoons called for, and gradually work your way up. You can't taste a super low ratio, but your brain will recognize what you can't taste. Start low enough and you can SOMETIMES trick the brain)
- Helpers (have them help you cook, and have them assemble as much as possible, tasting all the way from beginning to end)
- ADD FATS (like boil carrots in chickenstock instead of water, melted butter/ranch/etc. for dips)... because our bodies are wired to crave fats
- No stress. (The more stress is added, the more likely a rejection will happen).
- Goofiness. (Like asparagus makes your pee smell terrible, or cabbage/beans/etc makes you fart. Kids are often willing to endure "terrible" tasting food for a funny outcome.)