Beef hash with jacket potato and salad

Name: Beef hash with jacket potato and salad
Prep time: 10 min
Cook time: 20 min
Total time: 30 min
Cuisine: European, British
Ingredients: 4 large baking potatoes; 2 sprigs of fresh rosemary; 4 teaspoons sour cream; 500g good-quality minced beef; 2 sprigs of fresh thyme; 1 red onion; 2 carrots; 3 sticks of celery; a few sprigs of fresh rosemary; 4 cloves of garlic; 6 tablespoons Worcestershire sauce; a small bunch of fresh flat-leaf parsley; 4 rashers of smoked streaky bacon; 2 tomatoes; 1 x 400g tin of butter beans; red wine vinegar; 2 or 3 sprigs of basil; 1 soft round lettuce; a small bag of rocket; avocado; 1 heaped tablespoon sour cream; lemon