Polenta with sun-dried tomato dressing

Ingredients

• Polenta
• 3 1/4 cup (810ml) vegetable stock
• 1 2/3 cup (410ml) skim milk
• 1 1/2 cup (250g) polenta
• 1/3 cup (40g) grated reduced-fat cheddar cheese
• 2 clove garlic, crushed
• 2 teaspoon olive oil
• 1 bunch large leek (500g), sliced thickly
• 1 tablespoon sugar
• Sun-dried tomato dressing
• cooking-oil spray
• 2 small brown onions (160g),chopped finely
• 1/4 cup (60ml) balsamic vinegar
• 1 1/2 cup (90g) sun-dried tomatoes
• 2 1/2 cup (625ml) vegetable stock