The shelf life of a sub with mayonnaise in the fridge can vary depending on several factors, including the ingredients used, the storage conditions, and the freshness of the ingredients when the sub was prepared. However, as a general guideline, a toasted sub with mayonnaise can last for about 3 to 4 days in the refrigerator.
Here are some considerations to keep in mind:
Quality of Ingredients: If the sub was made with fresh ingredients, it will likely have a longer shelf life compared to one made with ingredients closer to their expiration date.
Proper Storage: Make sure the sub is stored in an airtight container or wrapped tightly in plastic wrap to prevent it from drying out or absorbing odors from other items in the fridge.
Temperature: Keep the refrigerator temperature at or below 40°F (4°C) to slow down the growth of bacteria and extend the sub's freshness.
Mayonnaise: Mayonnaise is a perishable item, and its quality can deteriorate quickly when left at room temperature. If your sub contains mayonnaise, it's essential to refrigerate it promptly and not leave it out at room temperature for an extended period.
Use Your Senses: Always use your senses (sight, smell, and taste) to assess the sub's freshness. If it looks or smells off or if you notice any unusual changes in taste or texture, it's best to discard it.
Keep in mind that these are general guidelines, and the actual shelf life can vary based on the specific circumstances. When in doubt, it's always safer to err on the side of caution and consume the sub within a couple of days or freeze it for longer storage. If the sub was left out at room temperature for an extended period before being refrigerated, its shelf life would be significantly reduced, and it may not be safe to consume beyond a few hours.