Claire A for president!!
A 2 year old can eat enough by 19h00 to sustain itself through the night. And "I'm hungry" is probably not "I am starving and will expire if I do not get food.." it is probably more likely to mean "I really would like some special one on one time with my mommy around now - I wonder if I should order Nesquick, tea or a slice of toast."
Kids learn what we teach them. Dinner time is dinner time, and what you do not eat now, will need to wait until breakfast which is at 7:30am - is often a good lesson to teach.
Sorry kitchen he is closed after 7pm is also a good one.
It is 7pm goodnight - unless you are bleeding from an artery I will see you at 7am, sleep well, mom loves you - is also a good lesson.
Shame man - a strong willed 2 year old is rough, but you have survived puberty, got through pregnancy, gave birth and survived the first 6 - 8 weeks, you can do anything at this point. So wear your big-girl-panties and show your LO why you get to be the boss of your house.
Good luck - first week is going to be hell, so set up your rules before hand, and stick to them, no matter how tempting it is to just run into the room and pick your LO up. Leave the door closed, lie in the passage and sob quietly if you have to - just leave your LO to figure it out, that it really is sleep time and mom is not coming.