Lightly toast the millet, the finely chopped onion and the crushed garlic clove in butter. Deglaze with the vegetable stock, bring to the boil and leave to soak for 15 minutes in a closed saucepan without heat. Grease the baking dish and layer alternately a layer of millet and a layer of cheese. Baked in a preheated oven at 180 degrees for approx. 20 minutes until golden yellow.