Put quinoa and water in a pot and bring to boil. Reduce heat to simmer, cover and cook for 15 minutes, or until all the water in absorbed. Fluff quinoa with fork and add salt and pepper to taste.
Divide the quinoa mixture between 4 plates and top with avocado slices.
Notes
If you own rice cooker or Instant Pot, you it to cook quinoa - it's so much easier than stove top! See my recipes for Instant Pot Quinoa and Rice Cooker Quinoa.
If you want to cook beans from scratch instead of using canned, see my Instant Pot beans recipe.