Wash the yellow squash, trim off the top and cut it into equally thin slices.
Place the sliced yellow squash in a pot and pour the vegetable stock into it.
Place the pot on medium heat and bring it to a boil.
Cover the pot and let it cook for 5 minutes or until the yellow squash is tender.
Drain the cooked squash slices and set them aside. Discard the liquid.
In a high-speed blender jug, add soaked cashews, water, red bell pepper, nutritional yeast, onion powder, garlic powder, cayenne pepper, and salt.
Blend until you get a smooth consistency sauce. You can add more water if the sauce is too thick.
Grease a casserole pan with coconut oil.
Layer cooked yellow squash slices in the bottom of the casserole pan. Pour vegan cheese sauce on top.
Cover with breadcrumbs and add a vegan button on top.
Place the casserole pan in a preheated oven at 400-degree f for 15 minutes or until you get a golden-brown top.