For maple almonds (optional to serve - can make ahead)
To make maple almonds, toast the slithered almonds in a dry skillet/frying pan, turning now and then, for around 5 minutes until starting to brown and they smell nutty.
Add the maple syrup and quickly stir to coat the nuts all over. If you have a nonstick skillet, you can remove it from the heat and set aside for the nuts to cool, stirring now and then to make sure they don't stick too much. If not, then pour the nuts onto a silicone baking mat or piece of wax paper to cool. Break the clumps of nuts slightly before using. You may not use all, and can make these a good 2-3 days ahead and store in a box at room temperature.
For oatmeal
Peel and finely grate the carrot.
Put oats, carrots, milk, water, cinnamon and ginger in a small pan and stir to mix. Bring to a boil, reduce heat and simmer, stirring occasionally, until the milk has reduced down and thickened slightly, around 7 - 10 minutes.
Add ground almonds, raisins and maple syrup and cook a minute or two more.
Serve warm, topped with maple almonds, if using, and eg a little extra maple syrup or other topping of your choice.
Video
Notes
If you prefer, you can use all milk rather than part milk, part water - this mix just balances out the richness if using whole milk. If you use part/semi skimmed, all milk would be better.