easy je...only 3 main ingredients:

butter, yellow onion, peeled tomato

use rice cooker set to 120°C, put in butter, after melted then put in yellow onion (cut half).

then take your time cut the tomato, set the rice cooker to 100°C and throw in all the tomato.

cook for 1 hour and crush all tomato, set the rice cooker to 40°C and simmer until you want to serve with your pasta.

stir fried your minced meat and mushroom then put into rice cooker simmer together with it.

season it with salt (with others sugar/black pepper/herbs if u want) before serving.