How to Prepare Chia. Mix chia seeds, either whole or ground, with water in a proportion of 1/3 cup of seeds to 2 cups of water. Stir every few minutes and let sit for about 30 minutes.Store this in a labeled and dated mason jar in the fridge. Now you will have it available for recipes when needed.ow to Prepare Chia. Mix chia seeds, either whole or ground, with water in a proportion of 1/3 cup of seeds to 2 cups of water. Stir every few minutes and let sit for about 30 minutes.