Buseca Uru Recipe from Uruguay with Pork and Parmesan Cheese

Ingredients

• 3-3.5 lb of dressed calf's tripe
• 1 large onion stuck with 2 cloves
• 3 stalks of celery , chopped
• salt
• 4 tbsp of butter
• 4 tbsp of pork or bacon fat , diced
• 6 small onions , finely chopped
• 2 carrots , chopped
• 1 sprig of sage
• 14 oz (397 g) of Italian peeled tomatoes , drained and chopped
• pepper
• 3-4 cups of cooked white (haricot) beans
• 0.5 cup of grated parmesan cheese