my toddler (16 mo) and i are vegetarian (ovo lacto). i would say that 1/3 to 1/2 of our meals are vegan, and that's a conservative estimate.
his only "milk" is breast milk. his other beverages include tea and water, and occasionally juice. he mostly drinks water if not nursing (and he nurses quite a bit still).
otherwise, he gets a lot of healthy food. an example from today:
breakfast: steal cut oatmeal and apple sauce
snack: blueberries and yogurt, orange
lunch: vegan asparagus and roasted pepper risotto
snack: i don't know yet, but i was thinking apples and nut butter dipping sauce
dinner: vegan burritos (black bean dip, guacamole, chopped or grated veggies of many kinds)
snack: steamed broccoli.
we pretty much eat the same thing every day.
my DH is omnivorous. so, my son does ask to try his foods. mostly, though, he doesn't eat them. he refuses all fish based on smell; he'll get a good look at chicken and beef but hand them back before tasting them and ask to have his hands washed (lol!). so, he's not so much into eating meat, even though he's very exposed to it.
but, we mostly eat vegan. and we're getting more raw food here too. he really loves his veggies all shredded up in various "cole slaw" versions. he loves cole slaw. so, i make one with zucchini, beets, carrots, steamed kale, etc etc etc. . .just whatever, and let it sit in the nice, raw dressing and he's a happy camper. he would eat variations on cole slaw til forever.