Make Passover Fish Cakes with the perfect balance of whitefish and savory fillings. Serve these Passover Fish Cakes with a lemony sour cream sauce. Cook onions and peppers in 1 Tbsp. oil in large skillet 3 min. or until crisp-tender; cool completely. Place in medium bowl. Add fish, matzo meal, 1 Tbsp. mayo, egg, parsle….