Speedy Sausage and Hash Brown Breakfast Casserole

to 6 hash brown patties , slightly thawed

shredded cheddar

cooked crumbled breakfast sausage (like Jimmy Dean) or cooked, diced ham

finely diced yellow onion

slices of bacon , cooked and chopped

milk

large eggs

Cajun seasoning (like Slap Ya Mama ), or to taste, optional

kosher salt , or to taste

freshly cracked black pepper , or to taste