1. Slice the mochi into quarters, about 3 1/2 inch by 2 1/2 inch by 1/4 inch thick. Place 1 piece of mochi in each section of a dry (do not oil) waffle iron. Cook until puffed up and slightly crispy but not hard and dry. Repeat until all mochi has been cooked. Place on a serving platter. 

2. To prepare the topping, place the rice syrup in a saucepan with the water, roasted walnuts, and a little freshly squeezed lemon juice. Place over a medium flame. When the syrup is hot, pour over each waffle.

3. Serve.

Another method to make mochi.

1. Warm a skillet and add a few drops of olive oil. Add the mochi and fry on one side for about 3 minutes. Use a low flame.

2. Turn the mochi over and continue to fry for another 3 minutes. The mochi will puff up in the middle and be crispy on the outside.

3. Remove and place on a serving dish.