Linguini with Tuna and Olives

Ingredients

• • 3/4 lb (375 g) linguini
  • 2 onions, roughly chopped
  • 1/4 cup (60 ml) olive oil
  • 2 cans (170 g/6 oz) oil-packed tuna
  • 2 cups (500 ml) cherry tomatoes, halved
  • 1/2 cup (125 ml) oil-packed dried black olives, pitted and quartered
  • 1/2 cup (125 ml) oil-packed green olives and dried black olives, pitted and quartered
  • 2 cloves garlic, chopped
  • 1/4 cup (60 ml) chopped flat-leaf parsley
  • Grated zest and juice of 1 lemon
  • Salt and pepper