1: Prepare the instant mashed potatoes according to package instructions, adding any required ingredients.
2: In a skillet, heat olive oil over medium heat. Add chopped onion, celery, and minced garlic; sauté until softened.
3: Add ground beef to the skillet and cook until browned.
4: Stir in tomato paste, flour, Worcestershire sauce, rosemary, thyme, and frozen vegetables. Cook for several minutes until heated through.
5: Transfer the beef mixture to a baking dish, top with prepared mashed potatoes, and layer with all dressed rippled chips.
6: Bake in a preheated oven until the top is golden brown and crispy.
