Cook and drain pasta according to package directions for al dente.
Preheat oven to 375 degrees.
Break up he block of Velveeta into small pieces. In a medium saucepan, melt the Velveeta, cheddar, milk, salt and paprika over low heat until creamy and smooth.
Combine pasta and cheese sauce in a large baking dish.
Make the breadcrumb topping: stir all ingredients except the butter together in a small bowl. Melt the butter and add it to the breadcrumb mixture. Stir to combine.
Sprinkle breadcrumb mixture evenly over the pasta. Bake 20 minutes, until golden brown.