4 tablespoons unsalted butter, olive oil, or coconut oil
2 medium yellow onions, thinly sliced
1 teaspoon fine grain sea salt, plus more to taste
3 teaspoons curry powder
1 teaspoon ground coriander
1 teaspoon ground cumin
1/2 teaspoon chile flakes
2 (28-ounce) cans whole tomatoes (pref. fire-roasted)
1 14-ounce can coconut milk

to serve: any of the following that sound good to you - cooked brown rice, lemon wedges, toasted almond slices, pan-fried paneer, fresh thyme or oregano, oregano drizzle, a poached egg