Onion and Arugula Frittata

INGREDIENTS 1 tablespoon olive oil 2 medium sweet onions, thinly sliced Kosher salt Pinch of red pepper flakes 4 cups arugula 3 whole eggs 5 egg whites ⅓ cup skim milk ¼ cup goat cheese crumbles INSTRUCTIONS 1. Preheat the oven to 350°. Heat the olive oil in a medium oven-safe skillet over medium heat. Add … Read more