Preheat oven to 375°F. Grease an 9"x13" casserole dish with nonstick spray, or melted butter, and set aside.
In a large bowl whisk the eggs, extract, and granulated sugar until fluffy. Mix in the milk, puree, pumpkin spice, and salt. Whisk until smooth and fully blended.
29 ounces Pumpkin puree, 6 large eggs, 2 cups granulated sugar, 1⅓ cups whole milk, 1 tablespoon pumpkin pie spice, 2 teaspoons vanilla extract, ¾ teaspoon salt
Pour the pumpkin mixture into the greased pan; set aside.
In another bowl, combine all of the crisp ingredients and mix until combined. Your mixture will have a texture of play sand, and feel crumbly. However, there should be no loose powders in the bowl. Using clean, or gloved hands to work the ingredients is the best method to get this incorporated.
1 cup all-purpose flour, 1 cup old-fashioned or quick cook oats, 1½ cups light brown sugar, 1 cup unsalted butter, 2 teaspoons ground cinnamon, ½ teaspoon ground nutmeg, ¾ cup pecans
Sprinkle the crisp mixture over the pumpkin custard. Bake uncovered at 375°F. for 45-55 minutes. When the crisp is done, the center will be no longer jiggly, and the top will feel firm to the touch. A tester inserted into the center of the crumble will come out clean.