I like to chop about 12-16 oz of bacon and fry it, then use about 1/2 to 2/3 pound of ham, and use shredded sharp cheddar. Also, 2 cups of onion is overwhelming, as the onion does not have time to cook in 30 minutes (the cook time I'd recommend). I'd either brown the two cups of onion in some of the bacon fat, or reduce it to one cup. You'll need to spread the hash browns out on paper towels and heat them for several minutes to get them thawed and get the water out. I also cook them about 35 minutes for more flavor and browning. Overall, with a few tweaks for my family's tastes, this is very good, with an au gratin-style creaminess, if you cook it for about 25 minutes (my kids can't handle eggs that are soft or runny). Too bad. So, we cook about 30 minutes, and we're all pretty happy.

Crumbled bacon can be substituted for diced ham and shredded Cheddar cheese can be substituted for Swiss cheese.
[I posted this recipe.]