In a small, non-metallic bowl thoroughly dissolve the yeast in the warm water, letting it sit for 10 minutes. In another medium container (non-metallic) mix 1 cup sugar and 1 cup flour. Now gradually mix in 1 cup of canna milk and dissolved yeast. Loosely cover and let it sit until bubbles rise. Leave covered in the refrigerator. The next day, stir with a non-metallic spoon, repeating on days 3 and 4, once daily. On day 5 stir in another cup each of sugar, canna milk and flour. Then, on days 6, 7, 8 and 9 stir once daily with non-metallic spoon. The last day, day 10, stir in the remaining cup each of flour, canna milk and sugar. Preheat oven to 325 degrees F and bake for 1 hour. It's a long process but potentially one of the best and highest quality edibles you've had. Sprinkle walnuts and brown sugar on top at 40 minutes of baking.