Heat 4 tbsp of vegetable oil or butter in a pan over medium heat. Add 2–3 finely chopped garlic cloves and sauté until fragrant. Stir in 1 finely chopped large red onion and cook until golden brown. Add 200g of canned chopped tomatoes and simmer until thickened. Add 600g of baby potatoes and cook for 5 minutes, stirring occasionally.