Heat the butter and oil in two large non-stick skillets over medium heat. Divide the potato mixture into 3 pancakes per skillet, pressing each pancake lightly together. To shape perfectly round rösti, press the mixture into an 8-cm (3/4-inch) cookie cutter. Fry the rösti for 8 minutes over medium heat. Carefully flip the rösti. Continue frying until tender and golden, about 8 minutes. Add butter as needed. Keep warm.
CARROT SABAYON
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