Mix eggs, 250 ml milk, 1 pinch of salt, flour and baking powder well. Cover and leave to swell for about 20 minutes. Meanwhile clean, wash and cut leek into rings. Peel, wash and slice the carrots.
Clean and wash the cauliflower and divide it into florets. Pre-boil cauliflower in boiling salted water for about 5 minutes. Drain and let drain well. Peel garlic and dice finely. Heat the oil in a pan.
Add leek, carrots and garlic. Deglaze with broth and 150 ml milk. Add cauliflower and peas. Stir in crème légère and bring to the boil. Let simmer for about 8 minutes. In the meantime stir mineral water into the pancake batter.
Wash parsley, dab dry and chop finely, except for a few leaves. Heat clarified butter in a pan, spread parsley leaves in it and pour pancake batter over it. Turn once and take out.
Repeat the procedure 3 times. Stir the sauce thickener into the sauce. Leave to cook for about 1 minute. Season with salt, pepper, 1 pinch of sugar and lemon juice. Stir in chopped parsley. Arrange pancakes and vegetable ragout on plates and serve immediately.