3. Make the Bravas Sauce
While the potatoes steam, make the bravas sauce. In a medium saute pan, heat the olive oil, onion, and garlic over medium-low heat and cook for 6-7 minutes. Adding the aromatics while the oil is still cool will allow them to slowly fry until just lightly golden brown. Add the smoked and hot paprika and salt to the pan and stir until the onion is evenly coated in the spices. Cook for 30 seconds, stirring constantly, to allow the spices to bloom. Add the flour and cook for 1 minute, stirring frequently. Whisk in the stock and increase the heat to medium. Continue to whisk until the sauce thickens, scraping the bottom of the pan to release any flour, about 4-5 minutes or until slightly thickened. Transfer the sauce to a blender and blend until smooth. Pour the sauce back into the pan, and cook an additional 2-4 minutes over medium heat, whisking constantly, until the sauce thickens enough to coat the back of a spoon. Remove from heat and set aside.