June’s Roasted Button Mushroom Halves Cook-Program is a quick and easy way to cook mushroom halves until they’re meaty, savory and tender. You’ll never suffer through a slimy mushroom again when you use your June to roast them to perfection. Try roasted mushroom halves in grain bowls and salads, in stuffings or stir fries, or serve them on their own as a umami-rich side to your favorite protein (like steak roasted in your June!). This Cook-Program works with cremini or white button mushrooms, but not baby bellas.