Elegant, moderate streth for salads, vegetables, smoked fowl, French cheese, and raspberry vinaigrettes. Walnut oil should not be heated. The crocks make a colorful presentation and preserve the oils freshness. A L'Olivier, France's most respected oil specialist. Founded in 1822, their quaint shop in the old Marais quarter of Paris is still serving Parisians who know their oils. Their specialty nut and seed oils are intensely delicious and healthful.