Scalloped Potatoes without hash horseradish

6 cups russet potatoes , peeled and sliced 1 large leek , washed and chopped 1 (2 ounce) jar sliced pimientos , drained 4 1/2 tablespoons flour 12 ounces ham[...]

10 3/4 cups mushrooms , sliced (about 3 pounds) 1 tablespoon olive oil 3/4 cup onion , minced 1/2 cup leek , minced (about 1 small) 2 garlic cloves , minced[...]

2 tablespoons butter 2 cups chopped leeks 2 cups chopped fennel 1 tablespoon minced garlic 1 1/2 teaspoons salt , divided 3/4 teaspoon fresh ground black[...]