Add the oil to a large cast-iron skillet over medium-high heat. Once hot, add the potatoes, spreading them out in an even layer, and turn the heat down to medium. Drape a piece of foil over the skillet (or place a lid slightly ajar on top) and cook the potatoes for 10 minutes. After 5 minutes, use a thin metal spatula to flip the potatoes.
3 tbsps olive oil, 1-1/2 lbs Russet potatoes, cut into 1/2-inch cubes (about 4 medium-sized potatoes)
After the potatoes have cooked for 10 minutes, add the onion and bell pepper and turn the heat down to medium-low. Drape a piece of foil over the skillet and cook for 5 minutes. Use a thin metal spatula to flip halfway through.
1 yellow onion, chopped, 1 green bell pepper, chopped
Stir in the garlic, salt, smoked paprika, and black pepper. Turn the heat down to low and cook (uncovered) for 3 minutes, stirring occasionally.
4 cloves garlic, crushed, 1 tsp table salt, 1/2 tsp smoked paprika, 1/2 tsp black pepper
Remove from the heat and sprinkle cilantro, parsley, or sliced scallion on top.
fresh cilantro, parsley or sliced scallion, for garnish (optional)
Serve immediately for the crispiest results.