My child does not like eating vegetables. How can I make him develop the habit?

Kids love to imitate their parents. You have to lead by example. If you want your kid to eat spinach, dump that packet of chips and head for palak paneer! Be enthusiastic about eating palak, karela and the likes that you probably hate. If you've been doing that already, try to present the same food in interesting styles to the kid. For example, have broccoli florets for snacks instead of lunch/dinner, make vegetable nuggets, give them finger foods — potato sticks, carrot sticks, cucumber slices etc. It will take some time, but have patience.