1) Preheat oven to 350 degrees. Spray a muffin pan with cooking spray and set aside. Heat 1 tablespoon of oil in a pan over medium heat. Add the sausage and cook for 5-7 minutes, until no longer pink. Remove sausage from pan and place on a paper towel lined plate.
2) Add the shallot and bell pepper to the pan and sprinkle with a pinch of salt and pepper. Cook for 3-5 minutes until soft. Add the garlic and cook for another minute. Turn off the heat and add the spinach and the cooked sausage. Stir to combine, then set aside.
3) In a separate bowl whisk together the eggs, milk, 1/2 teaspoon salt, 1/4 teaspoon pepper, and 1 tablespoon chopped chives. Distribute the meat mixture evenly into the muffin pan, and pour the egg mixture into each cup until almost full. Bake for 20-25 minutes and serve immediately! I love to serve this with my favorite salsa! Yum!