Here is a tomato sauce I make. You can mess around with the herbs and spices. I have made it a few times with different herbs. I like to use fresh as I grow them but dried should be ok to use. I now make larger amounts this was my original recipe.
Delia’s Tomato Sauce

30g onion 1.5
1 teaspoon olive oil 0
200g Tomato 4
2 teaspoons Wine Vinegar 0
3 splenda tablets 3
½ tsp garlic 1.1
½ teaspoon Ginger .3
Fresh herbs about 2 teaspoons total
Garlic chives
Oregano
Parsley neg. count
20g Tomato Paste 2.1

I sauté the onion in the olive oil then added the chopped tomato and simmer for about 20 mins on very low heat .
Add remainder of the ingredients and puree in the blender.
Put back in saucepan and cook slowly for about 10 mins be careful only have the stove on warm as you don’t want to burn the sauce. It should be quite thick if now just let it cook a little longer if by chance you get it to thick you can add a bit of water to it.
12carbs for total makes just over ½ cup of thick sauce