Add the zucchini slices and cook for about 5 minutes, or until barely tender.
Set aside.
In a second saucepan, heat the remaining 2 tbsp.
of olive oil.
Add the chopped onion and minced garlic and cook, stirring, for about 5 minutes, or until soft.
Reduce the heat to low and add the finely chopped tomatoes to the onion and garlic mixture.
Cook for about 15 minutes, until the tomatoes are soft and the mixture has thickened.
Season with salt and pepper.
Stir the cooked zucchini into the tomato sauce and pour this mixture into a casserole or gratin dish.
Sprinkle the fresh bread crumbs evenly over the top.
Dot with the remaining 1 tbsp.
of butter.
Bake for 10-15 minutes, or until the topping is golden and the gratin is heated through.
Notes / Tips / Wine Advice:
SummaryThis elegant gratin is a wonderful way to showcase fresh summer vegetables. The tender zucchini is baked with a rich tomato sauce and a crunchy breadcrumb topping for a comforting and flavorful side dish.Wine AdviceA crisp, dry Rosé from Provence or a light-bodied red like a Beaujolais would pair beautifully with the fresh tomatoes and rich flavors of the gratin.