One of eggs' most impressive talents is their ability to embrace and hold various ingredients together in a frittata. In essence, eggs offer you a creative outlet each weekend to gather up the leftovers in your refrigerator and pantry to form a unique frittata that will never taste exactly the same way twice. Consider the recipe below as a loose template to be altered according to what you've got lying around. You can substitute cooked pasta and rice for the potatoes, and cooked greens for the raw. Play around with different cheeses, or skip them altogether