Warm olive oil in a medium saucepan over medium heat.
Soften onion in the oil, stirring, until translucent, about 3 minutes.
Stir in garlic and cook until fragrant, 30 seconds.
Toast tomato paste in the pan, stirring, until darkened slightly, 1 minute.
Pour in crushed tomatoes and water, then mix in sugar, oregano, basil, salt, pepper, and red pepper flakes.
Bring to a gentle simmer. Cook uncovered, stirring occasionally, until thickened, 12–15 minutes.
Finish with balsamic vinegar, then taste and adjust salt or herbs as needed.
Cool slightly before using on pizza, or chill for later.
Notes
Variation: For a smoother sauce, blend with an immersion blender. Prefer no-cook? Skip simmering and rest the mixed sauce 30 minutes to meld flavors. Storage: Refrigerate up to 1 week or freeze in 1/2-cup portions for 3 months.This recipe is an original creation inspired by classic Pizza Sauce Recipes Made Easy flavors. All ingredient ratios and instructions are independently developed.