1. Preheat oven to 450°.
2. Combine 1/4 cup water and squash in an 8-inch square glass or ceramic baking dish. Cover tightly with plastic wrap; pierce plastic wrap 2 to 3 times. Microwave at HIGH 5 minutes or until tender; drain. Combine squash and kale in a large bowl. Wipe dish dry.
3. Heat a medium saucepan over medium heat. Add oil to pan; swirl to coat. Add garlic; cook 2 minutes or until garlic begins to brown, stirring occasionally. Weigh or lightly spoon flour into a dry measuring cup; level with a knife. Combine flour and 1/2 cup milk in a small bowl, stirring with a whisk until smooth. Add milk mixture and remaining 2 1/4 cups milk to pan; increase heat to medium-high. Bring to a boil; cook 1 minute or until thickened, stirring frequently. Remove from heat. Stir in 1 ounce Gruyère, Parmigiano-Reggiano cheese, salt, and pepper; stir until cheese melts.
4. Coat baking dish with cooking spray. Spread 1/3 cup milk mixture in bottom of dish. Arrange 2 noodles over milk mixture; top with half of squash mixture and 2/3 cup milk mixture. Repeat layers once, ending with remaining noodles and remaining milk mixture. Cover with foil; bake at 450° for 15 minutes. Remove foil; sprinkle remaining Gruyère and pecans over top. Bake, uncovered, at 450° for 10 minutes or until lightly browned and sauce is bubbly. Let stand 5 minutes.
MyRecipes is working with Let's Move!, the Partnership for a Healthier America, and USDA's MyPlate to give anyone looking for healthier options access to a trove of recipes that will help them create healthy, tasty plates. For more information about creating a healthy plate, visit www.choosemyplate.gov.