Cut your potatoes and place them in water for at least 30 minutes.
Preheat oven to 400.
Drain the potatoes and place on a baking sheet. Drizzle with oil of your choice (about 2 tablespoons) and sprinkle with salt. Place in oven for about 40 minutes, tossing with a spatula half way through.
Heat 1 tablespoon oil in a small saute pan over medium heat. Add onion and garlic and cook about 5 minutes until soft and fragrant. Add paprika and cook for 30 seconds more while stirring. Cool slightly.
Combine onion mixture, mayo, roasted tomato, hot pepper sauce, and vinegar in blender. Puree and blend well, add salt and pepper to taste (adjust spice level with hot pepper sauce). Set aside in fridge while waiting for potatoes.
When potatoes are done, place them in a bowl and serve sauce on the side or toss them in the sauce and serve immediately.