In a large mixing bowl, beat the egg whites on high speed until soft peaks form. Reduce speed to medium. Add sugar, 2 tbsp at a time, beating until stiff and glossy peaks form. Beat in the vinegar, vanilla and salt.
Spread into a greased 10 in spring form pan. Bake at 300 degrees for 65-70 min or until lightly browned. Remove to a wire rack to cool (the meringue will fall) Serve with strawberries and whipped cream. Store leftovers in the fridge.