“Premium Onion Chutney 250g” usually refers to a high-quality, jarred or pouched condiment, often featuring caramelized red onions, designed to add a savory-sweet, tangy flavor to meals. 
Several products fit this description based on the search results:
Geeta’s Premium Onion Chutney (210g/250g): A popular, versatile, and tangy blend of onions, chili, cumin, and nigella seeds, often paired with poppadums, cheeses, and cold meats.
Caramelised Onion Chutney (e.g., Cottage Delight or Cartwright & Butler): These 250g jars often feature onions slowly cooked in balsamic vinegar, offering a rich, sweet, and tangy flavor, suitable for cheeseboards, burgers, and crackers.
South Indian Style Onion Chutney/Thokku (250g): Specific brands, such as Mylapore Ganapathy’s or Diyanaturals, offer this as a spicy, traditional “Kara” chutney made with small onions, often used as a side for idli or dosa. 
Key Characteristics & Uses:
Weight: 250g (standard jar or pouch size).
Ingredients: Typically includes onions (often >80%), sugar/brown sugar, balsamic or cider vinegar, and spices like mustard seeds or chili.
Versatility: Used as a dip for snacks (samosas), a spread for sandwiches and wraps, or a topping for grilled meats and burgers.
Dietary: Often vegetarian and sometimes gluten-free. 
Alternatives in the 250g Category:
Ching’s Secret Schezwan Chutney (250g): A fiery, spicy, and tangy garlic/onion-based Indo-Chinese dip and spread.
Kolhapuri Kanda Lasun Masala (250g): A spicy, dry Maharashtrian onion-garlic paste.