In a medium bowl, mix oats, cinnamon, and salt. In a separate bowl, whisk eggs, and then mix in apple sauce, honey, milk, and vanilla.
Add the wet ingredients to the dry ingredients and stir to combine.
Grease a 9-inch square baking pan, then pour oat mixture into pan and spread evenly.
Bake for 40 minutes, or until top is golden and center is set.
Let cool, then slice into squares and store in the refrigerator.
Notes
If managing blood sugar, you could reduce the honey in this recipe. Another option would be to experiment with different sweeteners like stevia or monkfruit.