To get this trophy, the first thing you will need to do is unlock the Bistro
.
You can then visit the Bistro either in Twilight Town (located opposite the shop) or at any save point in the different worlds. This will take you to a menu where you can choose different recipes which will have an icon to the side of it to show you the mini game that you need to complete to finish the meal.
To get an "Excellent", you will need to either complete the mini game at a specific time or to do it as fast as possible. I have found the easiest one's to get the "Excellent" on are the chopping game (shown with a knife to the side of the recipe), or the salt and pepper mini game.
If you are going for the "Master Chef" achievement, this will unlock through progressing towards that.