Heat oil in a large nonstick skillet over medium heat. Add ginger and garlic; stir for 30 seconds. Lower heat if garlic starts to brown.
Add curry powder, curry paste and cumin; stir for 1 minute to bring out their flavor and aromas.
Add red pepper, mushrooms and scallions; stir for 1 minute then add coconut aminos, coconut sugar and coconut milk. Stir to completely mix and bring to a simmer (do not boil).
Add fish to the sauce, cover and simmer until cooked through, about 6 minutes (flesh is white and no longer transparent)
Remove from heat; stir in cilantro. Serve fish and sauce over a bed of rice or your favorite cooked grain. Serve with a lime wedge for added brightness (this adds a nice freshness, I wouldn't skip this) and enjoy!