Caramelized Onion-Potato Gratin

• 1 14 cups soft fresh breadcrumbs
• 14 cup chopped fresh Italian parsley
• 3 tablespoons freshly grated parmesan cheese
• 2 teaspoons lemon zest
• 3 tablespoons butter
• 2 large sweet onions, halved and thinly sliced
• 3 garlic cloves, minced
• 3 12 cups milk
• 1 34 teaspoons salt
• 1 12 teaspoons dried Italian seasoning
• 18 teaspoon fresh ground black pepper
• 1 (8 ounce) packageshredded Italian cheese blend
• 3 lbs baking potatoes, peeled and thinly sliced

1. Preheat oven to 375 degrees.
2. Combine first 4 ingredients in a small bowl.
3. Melt butter in a Dutch oven over medium-high heat; add onions, and cook, stirring often, 15 minutes or until onions are caramel colored; add garlic, and cook 1 minute.
4. Stir in flour, and cook, stirring constantly, 1 minute.
5. Gradually whisk in milk and next 3 ingredients.
6. Cook, whisking often, 8-9 minutes or until mixture thickens.
7. Remove from heat; stir in cheese until melted and smooth.
8. Layer half of potatoes in a lightly greased 13X9" baking dish; pour 2 cups of sauce over potatoes in dish.
9. Repeat layers once.
10. Bake, uncovered, for 1 hour and 10 minutes, or until golden brown and potatoes are fork tender, topping with breadcrumbs during last 15 minutes of baking.
11. Remove from oven and allow to stand for 10 minutes before serving.

breadcrumbs, fresh italian parsley, freshly grated parmesan cheese, lemon zest, butter, sweet onions, garlic, milk, salt, italian seasoning, ground black pepper, italian cheese blend, baking potatoes

Taken from www.food.com/recipe/caramelized-onion-potato-gratin-340641 (may not work)