Preheat oven to 350 degrees F and mist an 8x8-inch baking dish with nonstick cooking spray and set aside.
In a large bowl, gently whisk the eggs. Add the honey, lemon juice and zest, vanilla, baking powder and salt; whisk well. Add the almond milk and mix. Add the oats and blueberries; mix and transfer to the prepared baking disk.
Bake the oatmeal for 40-50 minutes or until set and top is beginning to brown. You may opt to prepare the oats at day or two ahead of time and bake in the morning.