First, I washed, peeled, and cut the potatoes into bite-sized cubes so they all roast evenly. Then in a bowl I mixed olive oil, lemon juice, garlic powder, cumin, paprika, black pepper, salt, and veg bouillon. I made sure the bouillon cubes dissolved properly so the flavor was spread uniformly.
Next, I added the potato cubes to that spice and oil mix, tossing so every piece was well coated. I laid them out in a single layer on a baking tray lined with a baking sheet, making sure none were overlapping so they crisp up well. Midway through roasting I stirred them once so both sides get golden.
Then I roasted in a preheated oven at about 200 °C (≈ 400 °F) for around 30 minutes, until the potatoes were tender inside and nicely golden outside. After taking them out, I let them cool a little before garnishing — I sprinkled chopped cilantro for freshness. Finally, I served it while it was still hot, so the edges stayed crispy.