Heat some boiling water in a pot. Peel some potatoes, cut them into quarters and boil them for about 15-20 minutes. When they are nice and soft, put them into a large bowl, along with some salt, pepper, garlic, butter, and mash them very well. Heat a pan on medium high heat and add some oil. Cook some mixed vegetables along with some ground beef for about 7-10 minutes while stirring and seasoning to taste with salt and pepper. Preheat your oven to 350 degrees. In a baking dish add your ground beef and vegetable mixture then spread your mashed potatoes on top and bake in the oven for about 15-20 minutes. Enjoy!