Actually, I make them from scratch, so to speak. No frozen hash browns, if you please.
Start with 1 onion finely chopped.
In a frying pan, melt 1/2 tbsp of butter and 1/2 tbsp olive oil. Simmer onion for 5-6 minutes over medium heat until onion softens, but do NOT brown onions. Add one chopped green and one chopped red bell pepper and continue simmering additional 5 minutes.
Transfer to bowl. In original frying pan, add another 1/2 tbsp olive oil and 1/2 tbsp butter and add in 2 lbs diced potatoes (1/2" cubes or smaller). Brown on all sides, or about 8-10 minutes. Combine with onion/peppers, serve.