Zucchini and Yellow Squash Gratin

Name: Zucchini and Yellow Squash Gratin
Ingredients: 2 tablespoons butter; 2 medium zucchini (about 7 ounces each), sliced crosswise ¼ inch thick; 2 medium yellow squash (about 7 ounces each), sliced crosswise ¼ inch thick; 2 shallots, minced; 2 garlic cloves, minced; Coarse salt and ground pepper; ½ cup heavy cream; 1 cup panko; ½ cup grated Parmesan cheese