01 - Preheat oven to 425°F. Arrange frozen tater tots in one layer on a large baking sheet. Bake for 25–30 minutes or until golden and crisp, turning halfway to ensure even browning.
02 - Meanwhile, bring a large pot of salted water to a boil. Add elbow macaroni and cook following package instructions until al dente. Drain well and set aside.
03 - In a medium saucepan over medium heat, melt unsalted butter. Whisk in all-purpose flour and cook for 1 minute. Gradually pour in whole milk and heavy cream, whisking constantly until the mixture is smooth and slightly thickened, about 2–3 minutes.
04 - Reduce heat to low. Add shredded cheddar, Monterey Jack, smoked paprika, ground cumin, garlic powder, salt, and black pepper. Stir until cheeses are fully melted and sauce is creamy and smooth.
05 - Add drained macaroni to the cheese sauce, stirring gently to ensure all pieces are coated evenly.
06 - Transfer crispy tater tots to a large ovenproof dish. Spoon the prepared mac and cheese evenly over the tater tots.
07 - Sprinkle shredded Mexican blend cheese on top. Place dish back in the oven and bake for 5 minutes or until cheese is melted and bubbly.
08 - Remove from oven. Garnish with sliced spring onions, diced tomato, jalapeño slices, and fresh cilantro. Drizzle sour cream and salsa over the top just before serving.