For filling, combine eggs, evaporated milk, and pumpkin in a medium mixing bowl. Add 3/4 cup granulated sugar, dark brown sugar, 1 tablespoon flour, cinnamon, 1/4 teaspoon salt, ginger, cloves, and nutmeg. With rotary beater or wire whisk, beat lightly just until combined; set aside.
For crust, pour butter into a 3-quart rectangular baking dish, tilting dish to spread butter evenly. Combine 1 cup flour, 1 cup granulated sugar, baking powder, 1 cup milk, vanilla, and 1/4 teaspoon salt in a small mixing bowl. Pour mixture over melted butter to make crust. Spoon or slowly pour pumpkin mixture evenly over crust. Bake in preheated oven for 50 to 55 minutes or until a wooden toothpick inserted near center comes out clean. Serve warm. If desired, garnish with pecan halves. Makes 8 to 10 servings.