Summer vegetable bake with cheesy spinach topping

Ingredients

• 4 medium-sized onions, thinly sliced
• 1/4 cup olive oil
• 2 garlic cloves
• 6 - 8 courgettes, sliced into 2-3cm rounds
• 2 -3 red or yellow peppers, de-seeded and sliced
• 2 kilogram tomatoes, roughly chopped
• 2 tablespoon each chopped fresh parsley and basil
• salt and pepper
• Topping
• 20 leaves silverbeet, stalks removed
• 50 gram butter
• 2 cup fresh breadcrumbs or torn up bread
• 2 tablespoon flour
• small handful parsley
• 150 gram feta cheese
• 1/2 cup grated Parmesan