Boil the potatoes until soft (approx 30-40 minutes). Let them cool down before adding to the baking tray.
While the potatoes are cooking, prepare your other ingredients.
In a bowl, whisk together eggs, milk, salt and pepper.
Once cooled, firmly press down the potatoes to the bottom of your dish until the base is solid. Brush over a little olive oil.
Layer the peppers, spinach, tomatoes and ham, then pour over the egg mixture. Top with the grated cheese.
Oven bake at 200C for 15 minutes (middle shelf). You can also air fry this recipe (lower shelf for 15 minutes.)