In a medium bowl, mix together saltines, egg, mustard, seasoning, mayonnaise and green onions. Once combined, gently fold in crab meat.
Place a biscuit/cookie cutter on a lined sheet pan (my cutter is 4-inch). Sprinkle a thin layer of panko inside the cookie cutter. Add enough crab so that when pressed is ½-inch thick. Sprinkle another thin layer of panko on top, then gently lift the cutter from the cake. Repeat until all the cakes are made.
Freeze 1 hour.
Heat a thin layer of olive oil in a skillet on medium-high heat. Once hot, fry the crab cakes on both sides until browned and heated through.
Serve immediately with lemon, green onions and remoulade sauce.