Season petite tenders with salt and pepper; sear beef on all sides in oil. Finish in 400° F oven 10 to 12 minutes for medium rare to medium doneness. Cool; wrap each petite tender tightly in plastic wrap and refrigerate.
Combine all ingredients in blender. Puree 4 to 5 minutes or until texture is no longer grainy, stopping blender occasionally to scrape down sides. If necessary, thin with more water to achieve consistency of a light coating. Cover and refrigerate.
Yield: About 5 cups
Carve 1 Tonnato Steak into 1/2-inch-thick slices; overlap slices on plate. Drizzle with 2 Tbsp. Tonnato Sauce, garnish with 5 strips peppers, 1 tsp. olives, 1/2 tsp. capers and 1/2 tsp. parsley. Drizzle plate with 1/2 tsp. olive oil.