Caramelized Onion and Potato Flan with butter

8 potatoes 8 slices bacon 1 large onion 2 tablespoons butter 1 tablespoon brown sugar chives (optional, sort of) 1/2 cup mayonnaise 1 tablespoon mustard 1[...]

4 eggs 1/4 cup milk salt and pepper, to taste 1 teaspoon butter 1 large onion , thinly sliced 1 small red skin potato , scrubbed, cubed and cooked 1 medium[...]

2 cups all-purpose flour 1/4 cup cold butter 1/3 cup shortening 1/3 cup cold water 1 pinch salt 1 lb yukon gold potato 1 lb sweet potato 3/4 lb parsnip 3[...]