Preheat to 425°F (220°C). Line a large baking sheet with parchment paper.
Dice the potatoes, peppers and onion into evenly sized pieces to ensure even roasting.
In a large bowl, combine the potatoes, peppers and onion.
Add smoked paprika, garlic powder, cumin, black pepper and salt (if using). Drizzle with vegetable broth or water and toss to coat evenly.
Spread the seasoned vegetables in a single layer on the prepared baking sheet. Avoid overcrowding for maximum crispiness.
Roast for 30-35 minutes, flipping halfway through, until the potatoes are golden and crispy and the peppers and onions are tender.
Enjoy as-is or top with avocado, hot sauce or your favorite plant-based condiments.