Zucchini and Veggie Slice

• 500 g frozen Pea Corn and Carrot mix
• 1 brown onion, chopped
• 3 zucchinis, grated
• 1 cup self raising flour
• 5 free range eggs
• 2 tbsp extra virgin olive oil
• 0.25 cup milk
• 1 cup grated cheese
• 0.25 tsp salt