In a saucepan, heat the oil. Saute the onion, garlic, ginger & mushrooms until soft. Add in the spinach and cook until wilted down. Meanwhile, in a separate pot, boil the water. Add in ramen noodles and seasoning packet. Cook until al dente (about 3-4 minutes) While ramen is cooking, add the can of coconut milk to the veggies, also the shrimp. Now add the ramen to the veggies and shrimp. Then add in the sriracha and red pepper flakes. Do a smaller amount to start if you are sensitive to spicy foods. Cook just til heated through, but no longer or the shrimp will become chewy and overcooked. This amount of spice was a medium hot for my tastes. Feel free to add more spice if you like. Serve piping hot!