Whisk together eggs, milk, salt and pepperoni medium mixing bowl. Set aside.
Heat olive oil in a large skillet over medium high heat. When oil begins shimmer, add shallot and chopped broccoli. Sauté until shallot is translucent, about 3 minutes.
Add greens to the skillet and toss until green just begins to wilt.
Remove from heat and spoon 2 tablespoons of greens mixture to each muffin slot.
Pour egg mixture into each slot so that it fills each slot 3/4 of the way.
Pop tray into the oven and cook for the 20-25 minutes, or until the egg coagulates.
Remove from oven and allow to cool for 5 minutes. Remove mini frittatas from the tin and serve. Enjoy!