Pre-heat your oven to 375 degrees.
Beat together your eggs and milk in a bowl, and season with salt, pepper, and/or any dried or fresh herbs. Set aside.
Heat a tablespoon or two of oil to sauteƩ any vegetables or aromatics, like onions.
Add your egg and herb mixture to the vegetables, and let set for 6 - 8 minutes on medium-high heat. Add your cheese to the top of the frittata at this time.
When the frittata has slightly set, move to the oven and bake for 15-18 minutes; the edges will brown and bubble and settle slightly when removed from the heat. Allow to set for 10-12 minutes before slicing and serving.