Before you make the sauce, measure the flour and spices into a small bowl and place your tomato paste near the stove. In a medium-sized pot over medium heat, warm the oil until shimmering (it should be warm enough that the spices sizzle on contact). Pour in the flour and spice mixture. While stirring constantly with a whisk, cook until fragrant and slightly deepened in color, about 1 minute. Whisk the tomato paste into the mixture, then slowly pour in the broth while whisking constantly to remove any lumps.