Pear and walnut pizza

Ingredients

• 2 tablespoon olive oil
• 1 clove garlic , crushed
• 1 prepared plain pizza base
• 1 large red onion, thinly sliced
• 2 pears, peeled, cored, cut into thin wedges
• 4 slices hot pancetta, coarsely chopped
• 3/4 cup balsamic vinegar
• 100 gram goat's cheese, crumbled
• 40 gram rocket
• 1/4 cup walnuts, chopped