Learn how to make homemade Italian marinara sauce, so you never have to use sauce from a jar again. Ingredients: olive oil, chopped onions, 4-6 minced garlic cloves, 1 can crushed tomatoes, dried basil, dried oregano, salt & pepper, 1 tsp sugar. Saute onions in olive oil on med-low flame until soft. Add garlic and spices. Stir. Add crushed tomatoes. Stir and cover. Bring to a boil, lower the heat and simmer on low for 20 minutes.