Spinach Egg Bites

Name: Spinach Egg Bites
Ingredients: Vegetable oil cooking spray, for the muffin pan; 6 large eggs; 1 cup grated fontina cheese; 1/2 cup whole-milk cottage cheese; 1/4 cup half-and-half; 1 cup baby spinach; Kosher salt and freshly ground black pepper; 1/2 cup finely chopped red, yellow and orange baby bell peppers (5 or 6 peppers); Flaky salt, for sprinkling; Crushed red pepper flakes, optional, for sprinkling; Full-fat plain Greek yogurt, for serving; Fresh flat-leaf Italian parsley leaves, for serving; Fresh cilantro leaves, for serving