Silky Spicy Tomato Sauce

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Details

9 Ingredients

• ¼ cup extra virgin olive oil
• 1 medium yellow onion, minced
• 4 garlic cloves, minced
• 1 to 2 tsps crushed red pepper flakes, or more if desired
• 1 26 oz box (or 1 28 oz can) crushed tomatoes
• 1 large pinch kosher salt
• 3 to 4 fresh basil leaves
• 2 Tbsps unsalted butter, cubed
• ¼ cup finely grated parmesan cheese