Franco's Tomato Sauce for Pasta

Ingredients

• 3 tablespoons olive oil
• 1/2 meduim onion, chopped
• 4 cloves garlic, sliced thin
• 1 large can tomatoes
• 1/2 teaspoon salt
• 1/2 teaspoon oregano
• 2 tablespoon parsley, chopped
• 1/2 stick butter
• 8 ounces macaroni, cooked and drained
• grated Parmesan cheese and chopped parsley for garnish