Transform a can of whole peeled tomatoes into a flavorful sauce for pizza or pasta, simply by adding garlic, red pepper flakes, and fresh oregano.
In a medium saucepan, heat olive oil over medium-high. Add garlic; cook until fragrant, about 1 minute. Add red-pepper flakes (optional) and tomatoes, breaking them up as you go. Season with salt and pepper. Bring to a boil, then reduce to a rapid simmer. Cook, stirring often, until sauce thickens, about 15 minutes. Stir in oregano leaves.
To store, refrigerate, up to 4 days, or freeze, up to 1 month.