Preheat the oven at 180°C.
Peel the sweet potato and grate it on the large grater side. Season with salt and pepper to taste.
Generously grease the muffins tray with olive oil spray puffs, then equally distribute the grated sweet potato. Use a spoon to even out the shreds inside each muffin hole bottom and walls.
Bake for 10 minutes at 180°C.
In the meantime, finely dice the smoked ham and fry it for 2 minutes on medium heat in a small pan (no oil added).
Beat the eggs in a bowl with a balloon whisk. Season with salt and pepper.
Take out the muffins tray and eaqually distribute the beatten eggs, then the diced ham inside each muffin hole.
Bake for another 15 minutes at the same temperature of 180°C.
Take the tray out and gently scoop out the muffins. I used a butter knife to gently detach the margins of the muffins and a spoon to get to the muffin's bottom and lift it up. I must admit that my muffins sticked a bit to the tray and I think it was due to the small amount of oil I used for greasing. If you don't mind, you can try adding more olive oil to the pan to grease it in the beginning.
Serve hot or cold with fresh veggies.