help me internet-kenobi

I have ingredients I need to use up but my brain is busy studying Genetics and dorking around in Minecraft. HOW I COOK VEGETABLES?! I've got:
leeks
butternut squash
potatoes
snow peas
firm tofu
zucchini
button mushrooms
beets
cabbage
poultry stock
and rice of various sorts.
Any ideas on what to do with them?