Cover pork loin with enough oil to coat. Season with dried spices, salt, and pepper.

Bake at 350° for approximately 1 hour or until pork reaches desired doneness. Pour mustard and walnuts atop pork loin during last 5 minutes of cooking.

Variations; Honey, pecans, fresh dill, lemon zest or juice, country dijon, horseradish, vinegar, white wine, habanero, bacon, pancetta, chives, cayenne, crushed pepper flakes, parsely, cilantro, scallions, ground jalapeño powder, coriander seed, ginger, apples, anise, capers, celery seed, lime, grapefruit, mint, paprika, red wine vinegar, sesame seed, soy, shallot, poppy