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Sweet balsamic onions with melted Cheddar and herbs on toast recipe

Sweet balsamic onions with melted Cheddar and herbs on toast recipe

2 ratings

Bring your lunchtime cheesy toast to the next level with the help of sweet, jammy onions caramelised in a balsamic glaze. Seasoning the cheese with freshly chopped herbs helps accentuate the savoury flavours, whilst the rocket adds a welcome peppery punch. See method

  • Makes 6
  • 5 mins to prepare and 40 mins to cook
  • 505 calories / serving
  • Vegetarian


  • 1 tbsp olive oil
  • 385g sweet onions, thinly sliced
  • 1 tbsp dark soft brown sugar
  • 2 tbsp balsamic vinegar
  • 400g whole seed bread, cut into 6 slices
  • 10g unsalted butter
  • 300g mature Cheddar, grated
  • 10g fresh thyme, leaves picked
  • 10g fresh sage, finely chopped
  • rocket leaves, to serve (optional)
If you don't have brown onions, try using white, red or spring onions

Each serving contains

  • Energy

  • Fat

    23g 33%
  • Saturates

    13g 67%
  • Sugars

    9g 10%
  • Salt

    1.6g 26%

of the reference intake
Carbohydrate 32.7g Protein 22.3g Fibre 3.1g


  1. Heat the oil in a frying pan over a medium heat. Cook the onions for 5 mins, then reduce the heat to low and add a splash of water. Cook for 30 mins, stirring regularly, until soft and caramelised.
  2. Increase the heat to medium and stir in the sugar and vinegar. Cook for 3 mins or until sticky and glossy. Remove from the heat and set aside to cool a little.
  3. Meanwhile, lightly toast the bread, then spread with butter. Mix the cooled onions with the grated cheese and herbs and scatter evenly over the toast. Grill for 5 mins or until melted and lightly golden; add a crack of black pepper and serve with rocket, if you like.

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