Mince the onion into 1 cm. Peel the garlic, remove the hard ends, cut in half and then use the flat side of the knife to crush.
Add olive oil and the garlic from Step 1 into a pot and cook on low heat for 20 minutes. Occasionally, stir from the bottom to make sure it doesn't burn.
Add the ◎ ingredients and cook on low heat for another 20 minutes, stirring occasionally.
Once the liquid has evaporated and it has a nice gloss, it's done. This is a tomato sauce base, which has a nice sweetness and richness without soup stock.
Here I added shrimp, squid, and a bit of white wine and cooked with the tomato sauce. Then I poured it over pasta.
Add a little bit of salt and it also works as a pizza sauce: https://cookpad.com/en/recipes/144219-make-your-own-meat-sauce
A recipe variation. Homemade Meat Sauce: https://cookpad.com/en/recipes/144219-make-your-own-meat-sauce