01 - Preheat oven to 425°F. Spread the fries on a baking sheet, toss with vegetable oil and salt, and bake according to package directions or until golden and crisp.
02 - While the fries bake, cook the crumbled chorizo in a large skillet over medium heat until browned, about 5–7 minutes. Remove the chorizo with a slotted spoon and set aside, leaving about 1 tbsp of rendered fat in the pan.
03 - In the same skillet, melt the butter. Add the diced onion and minced jalapeño, sautéing until softened, about 3 minutes. Stir in the flour and cook for 1 minute to form a roux.
04 - Gradually whisk in the whole milk. Simmer, stirring constantly, until the mixture thickens slightly, about 3–5 minutes.
05 - Reduce heat to low and add the shredded cheddar and Monterey Jack cheeses, stirring until fully melted and smooth.
06 - Stir in the smoked paprika, cumin, salt, and pepper to taste. Fold in the cooked chorizo, reserving a small amount for garnish if desired.
07 - Arrange the baked fries on a serving platter. Spoon the chorizo queso dip generously over the fries. Garnish with fresh cilantro and sliced jalapeño. Serve immediately while hot.