Preheat your oven to 375°F (190°C). Lightly brush the baking dish with a teaspoon of olive oil and set aside.
Arrange a layer of thin zucchini slices on the bottom of the dish, overlapping slightly for even coverage.
Add a layer of tomato slices on top of the zucchini, pressing gently to nestle them into place.
Sprinkle chopped herbs evenly over the layered vegetables, then season with salt and freshly ground pepper.
Repeat layering zucchini and tomatoes until the dish is filled, finishing with a top layer of tomatoes.
Drizzle the remaining olive oil over the top layer, allowing it to pool slightly around the edges for crispiness.
Mix the breadcrumbs with a tablespoon of olive oil and sprinkle evenly over the top to create a crunchy crust.
Crumble the feta cheese over the breadcrumb layer, ensuring some cheese touches the vegetables underneath.
Place the dish in the oven and bake until the top is golden brown and bubbling, about 40 minutes.
Remove from the oven and let it cool slightly for a few minutes—this helps the layers set up and makes serving easier.
Slice into squares or wedges, revealing the colorful, tender vegetables topped with crispy crumbs and feta.