In a saucepan, bring the broth, thyme, and kitchen bouquet to a low simmer. Continue to simmer to build flavor. Adjust any of the ingredients to taste as needed. Pour the cornstarch mixture a little at a time into the simmering broth until it thickens into a gravy. Season with salt and pepper to taste.
Peel and cut potatoes into bite-sized chunks so they all cook evenly. Place in a pot with salted cold water over high heat. Once boiling, turn the heat down to a simmer. Cook until tender. Check the potatoes by inserting a fork into them, once the fork slides in and out with ease, remove from heat and strain out all of the water. Run the potatoes through a ricer or mash very well with a fork.
In the meantime, melt the butter in a saucepan over low heat, then stir in the cream to warm then add to the potatoes and whip together until smooth. Season with salt and pepper to taste.
Heat the oil in a skillet or sauté pan on medium heat. In a bowl mix together the meat, Worcestershire sauce, and steak seasoning. Then form into equal patties and coat well with breadcrumbs, pressing them in with your hands. Once the oil is hot, fry the patties on both sides to a deep golden brown, about 2 to 3 minutes per side. Remove from the oil to a paper towel-lined plate to drain excess grease and season with salt to taste. Then cut into bite-sized chunks.
Place the mashed potatoes in a bowl, top with corn, country steak, cheese, and gravy over top. Garnish with scallions.