Grate parmesan. Mix eggs, egg yolk, cream, milk and parmesan. Season with salt and pepper. Place the silicone muffin tin (6 wells) in a higher casserole dish and pour on half of the hot water. Pour the egg mixture into the silicone cups and cook in the preheated oven (electric cooker: 150 °C/ convection oven: 125 °C/ gas: see manufacturer) for approx. 30 minutes
Leek onions clean, wash, in approx. 8 cm long pieces cut and the possibly formed onion lengthwise halve. Heat butter in a pan and fry the lower parts of the spring onions for about 5 minutes. Add vinegar and honey, season with salt and pepper. Now add the remaining spring onions and sage
Remove the flans from the oven and bain-marie and let them cool down for about 15 minutes. In the meantime, bake spring onions in a preheated oven (electric cooker: 200 °C/ circulating air: 175 °C/ gas: see manufacturer) for 10-15 minutes, turning occasionally. Remove the flanges from the tins and arrange on plates. Add the onion confits and serve