1. Prepare the required materials.
2. Beef and pork are chopped into fillings, carrots, onions, and celery are finely minced, and tomatoes are peeled and cut into small dices.
3. Pour olive oil into the pot and heat it up.
4. Add onions.
5. Saute the onion over low heat until fragrant.
6. Pour in beef and pork filling.
7. Stir-fry the beef and pork stuffing until cooked.
8. Add tomato diced, carrot and celery and stir-fry for 30 seconds.
9. Add the broth.
10. Then add the tomato sauce.
11. Finally add rosemary.
12. Stir well and simmer for 1 hour over medium-low heat.
13. After boiled for 1 hour, the juice has begun to be collected and thickened.
14. Adjust the cornstarch with water, add it to the meat sauce, and stir while adding.
15. Then boil the meat sauce and turn off the heat.
16. Put it in the fresh-keeping box and put it in the refrigerator after it is completely cooled.
17. Finished product
Tips:The meat sauce has a long storage time, and it can be frozen and stored directly. As long as it does not touch water after it is made, it will not go bad if it is left for a month.
Put the tomato in boiling water and blanch it to remove the skin easily.
