I'm quite a "no second chance person"... we don't & never have had tight rules in the house & I've never used the word naughty because I don't think it helps in anyway for the child to learn what is acceptable & they learn far more from focusing on what they can do, not what they can't.
For me if she's in a high chair. Only put one or two things at a time, so it can't be thrown. If it gets thrown, take her down & 5mins later ask if she wants a "re-do" otherwise assume she is a normal toddler living on thin air. I wouldn't offer milk & a biscuit as she'll get used to that. My DS2 didn't eat much from 3pm on wards until he was about 7yo... he probably ate evening meal once a week as a toddler, he just ate more earlier in the day.
For me I did 5 things on the plate... 1-2 knew would eat (like cheese & apple) 1-2 maybe eat (like carrot & chicken) 1-2 would be rejected (like chicken in a sauce) & I just did that every night. I'd give more of foods as appropriate. it literally took my eldest 100 exposures to try a new food, but we got there seeing major changes around 8yo... yes that long, but DH & I were both like that too & my brother & his brother who apparently were much better eaters became fussy as they got older... my nephew is the same, fantastic eater at 3yo, pretty limiting now at 12yo.