Mediterranean Vegetable Casserole

Ingredients

• 2 onions, sliced
• 6 zucchini, sliced
• 1/4 cup olive oil
• 1/4 cup flour
• 4 tomatoes, cut into wedges
• 1/2 red capsicum, cut into 2cm squares
• 1/2 green capsicum, cut into 2cm squares
• 1 cup black olives
• 1/3 cup basil, chopped
• 1/2 cup pine nuts
• 1/4 cup balsamic vinegar