Adding the flour
Once the stew meats and onion are well sautéed, add the flour to the casserole.
Stirring all ingredients
Stirring. The paste formed from flour and butter in cooking is called roux. It is a basic. It is important to cook it for a couple of minutes but without it taking color.
Adding the milk
Add the milk. As in any béchamel sauce, add the milk and stir with whisks without stopping. It does not matter if it is incorporated hot or cold if it is stirred with whisks.
Ready-made croquette dough
Cook until the dough thickens well, stirring all the time. The longer it is on the stove, the creamier the croquettes will be.