Bacon, Potato, & Cheese Mini Frittatas (Egg Muffins)

large eggs

milk

salt

Freshly ground black pepper,

bag frozen (all-natural) hash brown potatoes, thawed

slices bacon, cooked until crisp & finely chopped (for 3/4 cup)

freshly grated sharp cheddar cheese

fresh jalapeño (seeds & membranes removed), finely minced, optional

freshly grated Parmesan cheese, optional