Potato and Ham Frittata

Directions

1. 1
   Whisk the eggs vigorously.
2. 2
   Mix in the mustard, milk, salt and pepper.
3. 3
   Heat the oven to 400F.
4. 4
   In an ovenproof pan, thoroughly cook the onions and potatoes, in the olive oil.
5. 5
   Turn the heat to medium high and pour the eggs into the pan.
6. 6
   Let the eggs set for several seconds.
7. 7
   With a heatproof rubber spatula, gently stir the eggs, starting from the center.
8. 8
   This strring makes the frittata puff up more in the oven.
9. 9
   Lift the edges so that the eggs flow to the bottom.
10. 10
    When the frittata is half-set, add the ham.
11. 11
    Transfer the pan to the heated oven.
12. 12
    Cook for about 10 minutes (less if you like runny eggs) until puffed and golden.