If toasting bread is the limit of your culinary skills, then being a chef is probably not your métier. A métier, in other words, is a job to which you are particularly well suited by your skills.
Your métier can also be a particularly outstanding talent or strong point in general. If you're a chef, your divine steak frites might be your métier. If you're a mechanic, your ability to understand transmissions may be your métier. Often used interchangeably with forte, meaning "strong point." As the accent over the "e" in métier implies, it's originally from the French, because the French, darn them, are good at so many things. Particularly steak frites.