Heat some olive oil in a pan and add chopped onions. Cook for a few minutes, then add a pinch of salt and the garlic (pressed or chopped). After simmering for 10 more minutes, add some fresh herbs (chopped) and the canned tomatoes (all of the can, together with the juice). Cook for a few more minutes then transfer to the bottom of your baking dish.

Cut the zucchini, squash and eggplant into very thin slices (you can use a mandoline slicer). Place a zucchini slice in the middle, then cover it with a squash slice, and then with an eggplant slice on top of that. Repeat the process until you’ve created a spiral design in one long strand around the entire baking dish.