Preheat the oven to 350°F.
Bring a saucepan with quinoa, water, and sea salt to a boil. Once boiling give it a stir, add a lid, and turn heat to low. Cook for 10 minutes. Then remove the saucepan from the heat and set aside.
Meanwhile, cut the whole pineapple in half lengthwise, through the green top as well. Gently cut out the inner flesh, being careful not to cut through the outer skin. You're going to use the half of the pineapple as a serving bowl for the fried quinoa. Finely dice up the flesh of the pineapple you just scooped/cut from the outer skin and save the other half for another recipe.
Lay out cashews on a baking sheet and bake for 10 to 12 minutes, watching closely to prevent burning. Once the cashews are toasted and golden brown, remove them from the oven and set aside. Roughly chop them once cooled to touch. You could also use store bought roasted cashews and skip this step.
Heat a large cast iron skillet over medium-high with the vegetable oil. Once hot, add the red onion and bell peppers and sauté for 3 to 4 minutes. Then add the sliced mushrooms and continue cooking, stirring occasionally for another 5 minutes.
Add about 1 cup of finely diced pineapple, minced garlic, ginger, chili flakes, and chili powder and cook for another 4 to 5 minutes. Lower the heat if necessary so you don't burn the garlic.
While you're cooking the vegetables, you can combine the ingredients for the sauce in a bowl and set aside. If you don't have pineapple jackfruit jam, use more finely crushed pineapple and the juice and maybe some apple sauce and/or sugar. Adjust to your taste!
Add the cooked quinoa, ¾ of the sauce, and ½ the chopped cashews, toss well and spread the mixture in an even layer in the pan. Let it cook for 4 to 6 more minutes over medium high heat without stirring it, so you can develop some caramelization and "fried" looking crispy pieces.
Then turn off the heat and add green onion, fresh cilantro, and mint and stir to combine.
Fill the pineapple serving bowl with the pineapple fried quinoa and top with more fresh diced pineapple and the remaining cashews. Garnish with some herbs, if desired, and drizzle a bit more lime juice and sauce on top before serving!