Cowgirl Quiche

INGREDIENTS

3 cups

all-purpose or pastry flour, plus more if needed for rolling

1 tbsp

chopped chives

1 tsp

salt

3/4 cup

cold salted butter, cut into chunks

3/4 cup

cold vegetable shortening, cut into chunks

1 tbsp

distilled white vinegar

large egg, lightly beaten

leeks, tops and bottoms trimmed, cut in half lengthwise

16 oz

white mushrooms, sliced

2 tbsp

salted butter

1 cup

heavy cream

large eggs

2 cups

grated Swiss cheese

Salt and freshly ground black pepper

1 tbsp

pesto

thin slices prosciutto (or any good ham), chopped