No. Cauliflower cheese is not a proper noun and only the word cauliflower would have a capital on the first letter if it started a sentence.
Sexually no
Please use the nonstick pan.
children
The other kids at school made sure they avoided the rheumy kids.
I am going shopping and after am picking the kids from school.
Your kids are so unruly!
Kids always synced on their phone.
The kids were sabotaging the property.
The children were wrongly retributed by the teacher. This is an example sentence of retribution.
John and Fred walked in the mountains when they took a hike.
He refused to go to San Diego