Leek And Greens Tart With Cornmeal Crust

Name: Leek And Greens Tart With Cornmeal Crust
Ingredients: 1 1/2 cup all purpose flour; 1/2 cup cornmeal; 1/2 teaspoon salt; 1 tablespoon light brown sugar; 1/2 teaspoon freshly ground nutmeg; 12 tablespoons cold unsalted butter, cut into small pieces (yes, I know that's a lot, but just trust me, you'll be glad!); 1/4 cup ice cold water, plus a couple Tbs. more as necessary; 1 bunch of kale, washed and tough stalks removed (you could also use another winter green, if you'd like, kale is just my favorite); 5 cloves of garlic, peeled but left whole; 3 medium leeks, washed well and thinly sliced - just the white and light green portions; 2 tablespoons olive oil; 1 cup packed grated Cantal cheese (or Gruyere); juice of 1 lemon; 1/2 cup mascarpone cheese; 2 eggs; sea salt and fresh ground pepper; prepared cornmeal tart crust