Step 1

Wash and scrub the potatoes, then dry well. Cut them into ¾-inch cubes.

Step 2

In a large pot or dutch oven, bring 5 cups of water to a boil over high heat. Add the baking soda and stir to dissolve. Add the potatoes and 1 teaspoon salt. Stir and cook until the surface softens but not cooked all the way through, 5 to 6 minutes. Drain into a colander, gently shake off the excess moisture, then add back to the pot. Cook over low heat until the moisture evaporates, about 2 minutes.

Step 3

Turn off the heat, add 1 tablespoon butter and ¾ teaspoon salt. Stir until a starchy paste coats the surface, about 30 seconds. Set aside.

Step 4

In a large 12-inch skillet or cast iron pan, heat 1 tablespoon olive oil over medium heat. Add the diced onions and ¼ teaspoon salt. Saute until lightly browned and translucent, about 4 to 5 minutes. Add bell peppers, saute for 1 minute. Transfer to a bowl.

Step 5

Add 1 tablespoon butter and 1 tablespoon olive oil. Once the butter melts, add the potatoes. Stir and spread them in a single layer. Let it sit without stirring until the bottoms are golden brown, about 4 to 5 minutes.

Step 6

Turn the potatoes with a spatula. Repeat the process of spreading in a single layer, allowing to sit and fry for 4 to 5 minutes, until a majority of the sides are lightly browned and crisp, about 11 to 15 minutes. Individual pieces may need to be flipped over to ensure browning.

Step 7

Turn off the heat, evenly sprinkle the potatoes with paprika, onion powder, and black pepper. Stir to combine. Add the sauteed onions and bell peppers, cook until warmed through, about 1 minute. Season with salt and pepper to taste.

Step 8

Garnish with parsley and serve while hot.