How can you tell if an aubergine has gone off?

1. Discoloration: Fresh aubergines have a rich, deep purple color. If the aubergine starts to develop brown or black spots, or if the overall color fades significantly, it's a sign that it's overripe or starting to spoil.

2. Softness: Ripe aubergines should be firm to the touch, with a slight give when gently pressed. However, if the aubergine becomes very soft or mushy, it's overripe and starting to deteriorate.

3. Wrinkled skin: Fresh aubergines have smooth, glossy skin. As they start to age, the skin may develop wrinkles or become shriveled, indicating that they are losing moisture and freshness.

4. Discolored or moldy stem: The stem of a fresh aubergine should be green and firm. If the stem turns brown, black, or shows signs of mold, it's a sign that the aubergine is past its prime.

5. Off odor: Fresh aubergines typically have a mild, neutral smell. If you notice a strong, unpleasant odor coming from the aubergine, it could be a sign that it has spoiled.

Remember, it's always better to err on the side of caution when it comes to food safety. If you have any doubts about the freshness or quality of an aubergine, it's best to discard it to avoid consuming spoiled food.