Preheat oven to 425 degrees F.
Add 2 pounds diced Yukon gold potatoes to a bowl and toss with 2 tablespoons olive oil, 1 teaspoon kosher salt and ½ teaspoon black pepper. Even spread on a parchment-lined baking sheet.
Roast potatoes in the oven for 45 to 55 minutes, tossing every 15 to 20 minutes for even crispness.
In a large skillet, heat remaining 2 tablespoons olive oilover medium-high heat. Add in diced yellow onion and red bell pepper, cooking for 7 minutes, or until onion is translucent. Reduce heat to medium and add in 2 cloves minced garlic. Cook for 1 to 2 minutes.
Add in diced tomato and green chilies, along with both cans of drained and rinsed beans. Stir to combine and bring mixture to a simmer. Fold in roasted potatoes.
Season with remaining ½ teaspoon salt and ½ teaspoon pepper, along with ½ teaspoon each of ground cumin and chili powder. Stir to combine and taste for seasoning. Adjust, as needed.
To serve: Scoop about ½ to ¾ cup of bean and potato filling into each warmed tortilla. Top with the toppings of your choice and roll or fold the burritos.