Rao's tomato basil is legit, but it's more a marinara sauce.

Frank's all natural is the lowest carb jar sauce I've found. My daughter doesn't like it though. Too chunky for her. Fixed that up quick with my stick blender though.

I used Rao's "sensitive" marinara for a low carb lasagna last week. It doesn't have onions or garlic. I thought it was decent, and I think 4 carbs per 1/2 cup.

I use crushed tomatoes and spice mine up myself too.

I third the opening a can of tomatoes and adding your own spices/herbs... Its really easy and super cheap...

I like the Classico sauces when I'm feeling lazy. There's a few with only 5 or 6 carbs in 1/2 cup. Spicy Red Pepper, Florentine Spinach & Cheese, and some other good ones.
https://caloriecount.com/classico-nutrition-m1178

Even before my LC days, I avoided commercial pasta sauces. The alfredo sauces were disgusting and the marinara sauces are so sugar-laden they're halfway to ice cream toppings. Even if you're an unenthusiastic cook, making a big batch of tomato sauce and freezing it in individual serving sizes isn't a huge chore.

I make my own marinara and Alfredo sauces. Both are easy but take time and patience. When I'm back at my pc versus the phone I'll add my recipes

Everything I do I do to taste so ingredients tend to vary:

Marinara sauce

• Can of crushed tomatoes
• Can of tomato paste (the small one)
• Couple of fresh tomatoes peeled and seeded (peeling tomatoes is easy - boil water, drop in the 'mater, wait til the skin breaks, pull out, cool in water, slip out of it's skin.)

Put all that in a pot. Add salt and pepper to taste and cook on low while you:

• 1 Onion, diced
• Fresh Basil leaves chiffonade. I like lots myself.
• Dried oregano to taste
• Lots of garlic cloves, crushed
• Half bell pepper, diced
• Celery stalk diced small
• Shrooms diced small (usually two whole if they are small)
• and sometimes I add other veggies diced really small - broccoli, cauli, etc.

Saute above in butter with salt and pepper to taste. Add to tomatoes and cook on low as long as you like but at least an hour (this is the patience part) - you can do this in a crock pot if you like.

As it cooks I taste and add something to cut the acidic taste of the 'maters. Used to be sugar, but now it's a sweetener or sometimes a splash of cooking wine. Add water or broth as needed if it's too thick. Add more paste if too thin.

Alfredo Sauce

• 1 Onion diced
• Salt
• Pepper
• Lemon Juice
• Nutmeg to taste
• Butter
• Fresh shredded Parm or other cheese that melts nicely

Saute in LOTS of butter like a stick of it - you want to build a roux from this. So once the onion is sauteed, remove from pan, put pan on low and add more butter. For every tablespoon of butter you have (or think you have) add a thickener such a coconut flour or carbquik. Whisk like crazy until thick and no lumps. Slowly add a liquid - usually milk but I've started using coconut milk and chicken broth. Whisk like crazy. Add cheese you like and put onion back in. O Once melted add more of the ingredients to taste until you are happy. (personally I don't use nutmeg in mine)

You will have to measure to determine cals/carbs/etc based on what you actually use. I never make mine exactly the same, ever. I just find the very best options carb wise for tomatoes in a can.

eatfatlosefatblog.com/keto-low-carb-alfredo-sauce-recipe/

This is one of the "base" recipes I use to make alfredo. Cream will thicken on it's own as it simmers, no need for a flour, roux, or thickener.

Also, I really dislike the taste of nutmeg, passionately, but in this recipe, it elevates the umami or savory perfection side of a real alfredo sauce... Definitely worth trying if you haven...