Bitterness: Raw eggplant tastes bitter and unpleasant.
Spongy Texture: Undercooked eggplant feels chewy or rubbery.
Seeds: Visible, undercooked seeds remain white and hard.
Color: Cooked eggplant darkens; pale purple may indicate it's undercooked.
Cooking Time: Ensure adequate sautéing or roasting for proper texture.
Softness: Properly cooked eggplant should melt in your mouth.
Safety: Eating undercooked eggplant can irritate the stomach.