Cheesy rice

4 cups water
1 cup basmati rice
1/2 medium onion, chopped
3 tbsp butter
1 tbsp lemon juice
1/2 cup grated cheddar and/or parmesan cheese
salt
pepper

1. Bring water to boil over high heat.
2. Add rice and onion and boil for 16 minutes.
3. While the rice is cooking, cut the butter into small pieces and mix in a medium bowl with the lemon juice.
   
4. When the rice is done, drain it, but reserve 1/4 cup of the cooking liquid.
5. Add the hot rice mixture and reserved liquid to the butter mixture. Stir to melt the butter.
6. Add the cheese and stir.
7. Season with salt and pepper.