If you're talking about the method of cooking:**
* Boiling: This is a very different cooking method from grilling.
* Roasting: This involves cooking in an oven, rather than over direct heat.
* Steaming: This method cooks food with steam, not hot air or flame.
If you're talking about the event or gathering:**
* Formal dinner: This is a more structured and elegant event than a barbeque.
* Indoor gathering: This could be a party or event held inside, rather than outdoors.
If you're talking about the sauce:**
* Marinade: A marinade is used to flavor food before cooking, whereas barbeque sauce is typically applied during or after cooking.
* Other sauces: There are many different types of sauces that can be used as alternatives to barbeque sauce, depending on the desired flavor profile.
Ultimately, the best antonym for "barbeque" will depend on the specific context in which it is used.