1.   Also try spreading a little between layers of tomato and baked onion slices to make a napoleon of sorts.

2.   Brush onion slices with olive oil and grill on both sides until soft and well marked by the grill.

3.   Lay tomato slices and then onion slices across lettuce.

4.   Scatter onion slices over meat.

5.   Spread onion slices in oiled oven dish slightly larger than needed to lay out the fish.

6.   Sprinkle onion slices over tomato and season with oregano, thyme, salt and pepper.