01 -
In a big mixing bowl, stir together your leftover mashed taters, chopped-up veggies, and the onion until it all looks blended well.
02 -
On medium heat, melt the butter with the olive oil in a large frying pan until the butter gets bubbly.
03 -
Spread the potato mix evenly across the hot pan, pressing it down. Let it sizzle without touching it for about 10 to 15 minutes until the bottom turns golden and crisp.
04 -
Flip the potato blend (if it breaks apart a bit, no stress!) and cook for another 5 to 10 minutes, aiming for both sides to turn crunchy and golden.
05 -
Add salt and pepper as needed, serve nice and hot, and enjoy while it's still crispy!