It's easy to make restaurant-style Spaghetti Sauce using just a few ingredients. Adding sausage makes the sauce even more flavorful, but if you don't eat meat its okay to leave it out. This is the recipe I used throughout my long restaurant career.
120ouncescrushed tomato (four 28-32 ounce cans) San Marzano if possible
2poundssweet Italian sausage
2bunchesfresh basilfinely chopped
1mediumonion diced
½cupolive oil
1tablespoonsea saltor more to taste
½teaspoonblack pepperor more to taste
1tablespoonsugaroptional
Instructions
Place a large skillet or stock pot over medium high heat. When the pan is hot then add the olive oil and sausage. Saute sausage on both sides until it browns.
When the sausage has browned add the diced onion and chopped garlic. Continue cooking until the onions are translucent, but do not allow them to burn!
Add crushed tomatoes, rinse cans with just a little water and add to the sauce (if crushed tomatoes are not available use whole tomatoes and crush by hand or with an immersion blender).
add chopped basil, sea salt and black pepper to taste (don’t over season, you can always add more later). If you choose to add sugar now is the time to add it.
After your sauce has reached a boil, reduce the heat to simmer and continue to cook for at least two hours. If you've got the time let it simmer for 4-6 hours for an amazingly rich tomato sauce.