Four Cheese Mashed Potato Stuffed Portobello Mushrooms

Name: Four Cheese Mashed Potato Stuffed Portobello Mushrooms
Ingredients: 1 (4 ounce) package Idahoan® Four Cheese Flavored Mashed Potatoes; 2 large portobello mushrooms, or more depending on size; Oil; Salt and pepper; 1/2 cup Cheddar cheese, shredded; 2 tablespoons bell pepper, diced and lightly sauteed; 2 tablespoons scallions, chopped