Baby friendly from 9 months old.
3 tblsp butter (or: 45g, 1.5 oz)
8 tblsp flour (or: 60g, 2.25 oz, ½ cup)
20 oz milk (or: 2.5 cups, 60g)
½ swiss cheese
4 yolks / 4 whisked whites
Preheat oven at 400 F
Mix melted butter and flour vigorously together. Let pan on a high heat and add the milk. Continue to stir. Let cool down before adding the yolks, cheese and whisked egg whites.
Pour into a dish (usually individual ones).
Cook for about 30 mn.