Add 2 tablespoons water.
Microwave on High until the squash is tender, about 10 minutes.
(Alternatively, place squash halves, cut-side down, on a rimmed baking sheet.
Bake in a 400 degrees F oven until the squash is tender, 40 to 50 minutes.)
Place the squash shells, cut-side up, on a rimmed baking sheet.
Heat oil in a large skillet over medium-high heat.
Add garlic and cook, stirring, for 1 minute.
Whisk milk, Parmesan, cornstarch and pepper together in a measuring cup.
Add to the pan and cook, stirring, until thickened, 1 to 2 minutes more.
Stir in the squash flesh.
Fill the squash shells with the chicken mixture.
Bake until heated through and cheese has melted, 12 to 15 minutes.
- Daily Values (DVs) are the recommended amounts of nutrients to consume each day.
(-) Information is not currently available for this nutrient.
