Summer Squash Gratinée - PUBLISHED

http://www.finecooking.com/recipes/zucchini_summer_squash_gratin.aspx

1- Delicious! I just want to simplify the instructions, but this is a winner right out of the gate. And excellent dinner with good bread.
2 - Continues to be delicious. Simplified the instructions for phase 3.
3 - Just great. Publishing is next.

2 Tbs. olive oil
2 medium onions (14 oz. total), thinly sliced
2 cloves garlic, minced
1-1/4 lb. ripe red tomatoes, cored and cut into 1/4-inch slices
3/4 lb. (about 2 small) zucchini or other green summer squash, cut into 1/4-inch slices on the bias
3/4 lb. (about 2 small) yellow summer squash or golden zucchini, cut into 1/4-inch slices on the bias
3 Tbs. olive oil
1/4 cup fresh thyme leaves
1 tsp. coarse salt
1-1/4 cups freshly grated parmigiano reggiano
Freshly ground black pepper to taste

1. Sauté the onions in the oil over medium heat, stirring constantly, until golden (about 20 minutes). Add the garlic and sauté 1 to 2 minutes.
2. Spread the onions and garlic evenly in the bottom of an oiled 2-qt. shallow gratin dish.
3. Heat the oven to 375°F. 
4. Put the tomato slices on a shallow plate to drain for a few minutes and then discard any collected juices. 
5. In a bowl toss the zucchini and squash slices with the second batch of olive oil, the thyme and the salt. 
6. Reserve half of the cheese for the top of the gratin. 
7. Starting at one end of the baking dish, lay a row of slightly overlapping tomato slices across the width of the dish and sprinkle with a little of the cheese, then lay a row of zucchini overlapping the tomatoes, sprinkle with cheese. Repeat, until the dish is full.
8. Season lightly with pepper. Drizzle with some more olive oil and sprinkle over the reserved cheese. 
9. Cook until well-browned all over and the juices have bubbled for a while and reduced considerably, 65 to 70 minutes. Let cool for at least 15 min. before serving.