How do you cook quinoa?
Quinoa naturally contains a bitter compound on the outside of the seed.  Usually you have to rinse the quinoa to remove the bitterness but most commercial quinoa seems to have already been rinsed.  So, I no longer rinse my quinoa.  If you have time, it's nice to heat a pan and add the quinoa and toast it a little (for a nutty flavor and fluffier texture), then add water and salt.  I typically bring the water to a boil (2 cups water to 1 cup quinoa plus 1/4 tsp salt), cover and reduce the heat to a simmer for 10-20 minutes (or until the little tails release).  Lately I've found that using a rice cooker is a no-fuss way to prepare quinoa.  I usually just do quinoa, water and sea salt but you can add spices while cooking it if you want to enhance the flavor.  I would add vegetables afterwards. Quinoa is so quick-cooking I wouldn't see the need for a pressure cooker.