Preheat oven to 400°. Sprinkle tenderloin with 2 tsp. salt. Let stand 30 to 45 minutes.
Meanwhile, sauté panko, garlic, 1 tsp. pepper, and remaining 1 tsp. salt in 1 Tbsp. hot oil in a skillet over medium heat 2 to 3 minutes or until deep golden brown. Let cool completely (about 10 minutes). Stir in potato chips and next 4 ingredients.
Pat tenderloin dry with paper towels, and sprinkle with remaining 1 tsp. pepper. Brown beef in remaining 2 Tbsp. hot oil in a roasting pan over medium-high heat until browned on all sides (about 2 to 3 minutes per side). Transfer tenderloin to a wire rack in an aluminum foil-lined jelly-roll pan. Let stand 10 minutes.
Spread mustard over tenderloin. Press panko mixture onto top and sides.
Bake at 400° for 40 to 45 minutes or until coating is crisp and a meat thermometer inserted into thickest portion registers 130° (rare). Let stand 10 minutes. Garnish, if desired.
Note: For medium-rare, cook tenderloin to 135°; for medium, cook to 150°.