1 Heat olive oil, onions, garlic, and thyme over low heat. 2 Cook, stirring occasionally, until most of the moisture has evaporated and the onion mixture is very soft, almost smooth, and caramelized, about 45 minutes. Season with salt and pepper.3 Spray baking sheet, lay out matzos and spread tomato sauce. 4 Cover the matzo with the onion mixture, sprinkle with capers and pine nuts if desired, and then shredded mozzarella cheese. 5 Bake in pre-heated 400 degree oven for 5 minutes or until melted.