Makoto Trotter, naturopathic doctor, explains how to cook quinoa and buckwheat for breakfast. Brown rice takes 45 minutes to boil, so if you want a faster-cooking whole grain, try quinoa and buckwheat. Quinoa comes in black and red varieties. It takes 10 to 15 minutes to cook, as does buckwheat. To prepare quinoa, be sure to wash it carefully to avoid a bitter taste. Use 1 cup of quinoa to every 1 1/2 cups of water. Once it boils, turn it down to simmer for 15 minutes. You can eat quinoa as a side dish for dinner, as a salad or for breakfast.