Baked Lemon and Vanilla Oatmeal with Strawberries

Preheat oven to 350 degrees F. Lightly grease a 9- by 13-inch baking dish with cooking spray; set aside. In a large bowl, whisk together milk, 1/3 cup sugar, vanilla, salt, lemon zest, and nutmeg. Add oats and stir to combine. Transfer to prepared dish and spread out evenly. (At this point, the oatmeal can be baked immediately or covered and refrigerated overnight.) Bake, stirring halfway through, until mixture is thick and oats are tender, about 30 minutes. Set aside 5 minutes to let cool and thicken. Meanwhile, make strawberry topping: In a medium bowl, toss together berries, mint, remaining 2 tablespoons sugar, and vinegar; set aside 15 minutes. To serve, spoon oatmeal into bowls and add strawberry topping.