Summer Squash Gratin without oregano

2 cups small-curd nonfat cottage cheese or 2 cups low-fat cottage cheese 1 1/2 lbs summer squash (can be yellow, green or a mixture) salt , to taste 1/2[...]

3 tablespoons olive oil , plus about 1/2 teaspoon olive oil , for the baking dish 1 medium onion , minced 2 lbs zucchini or 2 lbs yellow squash, finely diced[...]