Saute garlic, mushrooms and scallions in oil until vegetables are limp, about 5 minutes. Meanwhile, place cashews in a blender or food processor and grin to a coarse meal. Transfer mushroom mixture and ground cashews to a large bowl and add potatoes, carrots, ginger, salt and pepper. Add bread crumbs a mix well. The mixture will be soft and moist. On a large baking sheet or bread board, make 8 to 10 beds of sesame seeds fo patties. Using a large spoon, scoop out vegetable mixture and form 8 to 10 patties; place on sesame beds. Flip to coat both sides generously. Gently transfer to a well-oiled vegetable grill and grill for 3 to 4 minutes on ea side, until medium brown. Makes 8 to 10 patties. Variation: Saute burgers in olive oil until golden brown.