Quinoa Stuffed Portobella Mushrooms

This is one of those ideas where you can literally take any leftovers, stuff it in a mushroom, top it with cheese and call it good. Here I have used "leftover" quinoa and beans and added flavorings that I typically have in my fridge. Use any grain or pasta, meat (or not), vegetables, tomato sauce, pesto, you get the idea. Goat cheese would pair nicely with the mushrooms, as well as, parmesan, feta, or fontina. Serve with a salad on the side for a nice, light dinner.
4 portobella mushrooms, stemmed and dark gills removed
2 tablespoons grapeseed oil
2 cups cooked quinoa
1 cup cooked white beans (rinsed canned beans will work)
1 sprig rosemary, finely minced
1 teaspoon lemon zest
1/2 cup stock
1/3 cup toasted pinenuts
1/2 cup grated manchego cheese
1/4 cup whole wheat panko bread crumbs
salt and pepper

Preheat oven to 400 degrees. Rub each mushroom with oil, salt and pepper. Bake for 10 minutes. While the mushrooms are baking, combine quinoa, beans, rosemary, lemon zest, stock, and pinenuts. Salt and pepper to taste. Remove mushrooms from oven and stuff each with the quinoa mixture. Top with cheese, breadcrumbs, and a little more salt and pepper. Drizzle 1 teaspoon of oil onto the breadcrumbs. Return to oven and bake for an additional 10 minutes or until cheese is melted.