How To Make Homemade Marinara Sauce

00:00 introduction. Using olive oil, onion, garlic, crushed tomatoes, basil, sugar, oregano, sea salt, black pepper, and red pepper flakes, this homemade marinara sauce is made by heating the oil until shimmering (00:23), adding onion and cooking until translucent (00:45), adding garlic until fragrant (01:21), then adding the tomatoes and seasonings, stirring and reducing heat (01:46). The sauce simmers for 15–20 minutes, stirring occasionally (02:55), and can be used as desired.