Grains cake

1. Line a loaf pan with parchment paper.
2. Add all ingredients into a bowl. Stir until thoroughly mixed. All dry ingredients should be moistened, but the batter will remain very thick (add 1 to 2 tablespoons (15 to 30 ml) of additional water if needed). Pour the mixture into the loaf pan. Smooth the top with a spoon.
3. Let stand at room temperature for 2 hours. The batter is ready if it retains its shape when lifted from the parchment-lined pan.
4. Preheat the oven to 350°F (180°C).
5. Place the loaf pan in the oven on the middle rack , and oven-bake for 40 minutes.
6. Remove the cake from the pan, place it upside down directly on the rack, and bake for 20 minutes. The cake is ready when you tap it and hear a hollow sound.
7. Let cool the cake thoroughly before slicing.
8. This cake can be kept in an hermetically sealed container for up to 5 days.

Note: You can also slice the cake and store it in the freezer; you can quickly toast it in the morning for breakfast.