custard: [15] A custard was originally a pie, which took its name from its ‘crust’ (Anglo- Norman *crustade, the source of the word, was a derivative of Old French crouste, from which English got crust). The earliest English form was crustade, and intermediate spellings crustarde and custade occur. The reference in the name is to the pie’s pastry shell, not to its lid, for it had none: it was an open pie, of meat or fruit, filled up with stock or milk. This liquid was often thickened with eggs, and by around 1600 the term had moved across to name a dish in its own right made of eggs beaten into milk and cooked. => crust
custard (n.)
mid-14c., "meat or fruit pie," crustade, from Middle French croustade (Modern French coutarde), from Old Proven?al croustado "fruit tart," literally "something covered with crust," from crosta "crust," from Latin crusta (see crust (n.)). Modern meaning is c. 1600. Spelling change perhaps by influence of mustard.
例文
1. Blend a little milk with the custard powder to form a paste.
カスタードソース粉に牛乳を少し加え、とろとろになるまでかき混ぜる。
2.Stir the custard occasionally to prevent a skin forming.