In a large skillet, heat ½ tablespoon olive oil, add the spinach, a few pinches of salt, and cook until just wilted. (You may have to let some cook down before you can fit more into the pan, or add & remove it in batches - just don't overcook it). Turn off the heat, and place spinach in a colander to drain.
Once it's cool to the touch, press out as much liquid as you can. And then press out some more. Don't skip this step or you will have watery creamed spinach.
Make the fried shallots: In a separate smaller skillet, heat your fry oil. Toss shallots together with the cornstarch until they're fully coated. Test fry a shallot, making sure your oil is at the right temp (they should become golden brown in about 30 seconds). Fry the rest in batches, drain on paper towels and sprinkle with a few pinches of salt. Set aside.
Whisk together the coconut milk, Dijon mustard, a pinch of salt, and corn starch. Set aside.
Wipe out the skillet you used for the spinach and heat ½ tablespoon more oil. Add the chopped shallot, mushrooms, garlic, and pinches of salt and pepper, and cook for a few minutes, until soft. Squeeze lemon into the pan, give it a stir, and turn heat to low. Add half the coconut milk mixture and stir.
Add the spinach back to the pan. Pour in the rest of the coconut milk mixture and stir just until the spinach and coconut milk are warmed through. (You want to cook the spinach as little as possible so it doesn't lose it's vibrant green color and become mushy). Remove from heat and pour into a serving platter.
Top with the fried shallots just as you're ready to serve so they stay crispy.
Recipe by Love and Lemons at https://www.loveandlemons.com/coconut-creamed-spinach/