Whisk together the mayonnaise, sour cream, lemon juice, smoked paprika, garlic, 3/4 cup of the manchego, 1/2 teaspoon salt and a few grinds of pepper in a large bowl.
Add the pasta to the boiling water and cook according to the package directions. Drain and rinse under cold water to cool; add to the bowl with the dressing.
Add the ham, parsley and red peppers to the bowl and toss to combine. Season with salt and pepper. Top with the remaining 1/4 cup manchego and sprinkle with smoked paprika. The pasta salad is best if served right away.
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