This slow cooker tomato Red Sauce makes a terrific pasta sauce, and it's so easy when you start with canned tomatoes.

Make your tomato red sauce (pasta sauce) in your slow cooker. Easy peasy.
Tomato red sauce (pasta sauce) is super easy in the slow cooker.
Guess what I'm making today? Tomato Red Sauce! I have made this Pasta Sauce multiple times and it's terrific every time. I use it in many different recipes, including Egyptian Eggplant, Spaghetti, Baked Ziti and Moussaka. I suggest using it anytime you are making Italian food.
Slow Cooker Method
I make my Tomato Red Sauce (Pasta Sauce) in the slow cooker (affiliate link) so that I don't have to watch it while it cooks. Making it in the crockpot takes 4 hours when you start with canned tomatoes. It's a bit messy since you don't cover the pot. Leave the top off because you want the liquid to cook down and the flavors to deepen.
Alternative Method
If you don't have a slow cooker, you can cook it on top of the stove, stirring frequently, for an hour. It is delish either way.
How to Store the Sauce
When the sauce is done, you can freeze it or can it (using a pressure cooker) in meal-size containers. Canning the sauce allows you to store it longer. If you are worried about medical or natural disasters, this is the best way to store it. No refrigeration required.
We can ours in pint-sized jars. Our large slow cooker (6 qt size) fills about 11 pints. That makes supper so easy. We can just open a jar, add a few new veggies or meat to jazz it up, and serve it over pasta or spiral zucchini noodles. I love it plain over Spaghetti Squash. Eleven meals in just 4 hours without having to babysit the cooking process!

Homemade Tomato Red Sauce in pint jars
If you like meat or extra vegetables in your red sauce add it when you are heating it up for your pasta dinner. You can fry some ground beef, ground turkey or Italian sausage and add it to the sauce just before you serve it. Sauteed mushrooms, artichokes, or zucchini are also good.
What You Need
For this recipe, you need a slow cooker, knife, cutting board, measuring cups and spoons and some means to store all the sauce. We use our big pressure cooker for canning the sauce, putting it in pint-sized jars. Then we have sauce for about 11 meals! Brilliant.
Tomato Red Sauce (Pasta Sauce) Recipe

Tomato Red Sauce (Pasta Sauce) Recipe
Ingredients
- 3 tablespoons olive oil
- 2 cups chopped onions
- 4 cloves garlic minced
- 2 teaspoons dried basil or 2 tablespoons chopped fresh basil
- 1 teaspoon dried marjoram or 1 tablespoon chopped fresh marjoram
- 1 teaspoon dried oregano or 1 tablespoon chopped fresh chopped oregano
- 1 cup chopped red bell peppers
- 1 cup chopped green bell peppers
- 3 28- ounce cans crushed tomatoes
- 1 28- ounce can tomato sauce
- 1 cup dry red wine like burgundy
- 3 tablespoons tomato paste
- 1 teaspoon salt
- ½ teaspoon ground black pepper
Instructions
- Sauté the onions over medium heat in the olive oil until they are transparent.
- Add the bell peppers, garlic and spices and cook for a five minutes or so longer.
- Dump the peppers and onions mixture into your crockpot.
- Add the tomatoes, sauce, red wine, tomato paste, salt and pepper to the slow cooker.
- Cook uncovered on high for 4 hours or until the sauce reduces about one-third.
Notes
Recipe Nutrition Information
This recipe is GF, DF, NF, SF, EF, V, VG*
The information shown is an estimate provided by an online nutrition calculator. It should not be considered a substitute for a professional nutritionist's advice.

Red Sauce Nutrition Label. Each serving is about 1 cup.
Nourish Your Body & Soul
I encourage you to care of yourself by eating satisfying, nourishing food that is good for your body and makes you feel healthy. Protect your spirit by living authentically, moving your body, and taking time to replenish and rest. I think you might also like these recipes & posts from Recipe Idea Shop:
- Eggplant Gina
- Moussaka
- Egyptian Eggplant
- Grilled Eggplant Pamesan
- Don's Eggplant Parmesan
- Three Cheese Vegetarian Eggplant Parmesan
- Minty Eggplant Rollups
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This amazing Tomato Red Sauce is super easy, starting with canned tomatoes. 15 minutes active, 4 hours in the slow cooker.

Tomato Red Sauce has never been so easy. SO much better than store bought OR Mom's.
*Allergen Key
GF = Gluten free | DF = Dairy free | NF = Nut free | SF = Soy free | EF = Egg free | CF = Corn free | V = Vegetarian | VG = Vegan
Note: If you have serious allergies or sensitivities, to be considered free of these allergens, you need to use products specifically marked "gluten free," etc. There can be cross-contamination in facilities.
Last Updated on August 11, 2022 by Adriana
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