Roast potatoes in a preheated 375-degree oven. While roasting potatoes, sweat onion in olive oil until translucent. Add garlic and cook for 2 minutes. Deglaze pan with white wine and reduce until almost all liquid is gone. Add orange juice and reduce by 2/3. Fold in herbs and season with salt and pepper. When potatoes are done, pour hot mojo over potatoes and serve immediately.