Preheat the oven to 400°.

Heat olive oil in a skillet and cook ham, onion and asparagus until the onion is soft.

Spoon half of the mixture into a greased 8” pie plate.

Layer half the cheese over, then repeat the layers.

Whisk together milk, eggs, and salt in a bowl.

Pour over ingredients in the pie plate.

Bake 25-30 minutes, until a knife comes out clean.

Let stand 10 minutes before serving.