Wash 1 pound fresh spinach well. Use a kitchen towel to fully remove liquid from spinach leaves. Remove and discard any large stems on the spinach.
In a large non-stick stock pan (or dutch oven), heat 1 tablespoon extra virgin olive oil over medium heat. Add in 3 cloves garlic (minced) and cook for 30 seconds, or until JUST fragrant.
Add in spinach, packing it down a bit if needed. Gently stir with a wooden spoon to coat the spinach as best as you can with the oil. Turn heat to low, cover and cook for 2 minutes.
Remove the lid, increase the heat to medium, add ½ teaspoon kosher salt, ½ teaspoon black pepper, and ½ teaspoon red pepper flakes. Continue to saute, uncovered, stirring frequently with a wooden spoon, for 1-2 minutes, or until spinach is just wilted.
Remove from heat and drain off any excess liquid from the pan, if needed.
Add juice of 1 medium lemon (and optional 2 tablespoons golden raisins OR 2 tablespoons grated Parmesan cheese if desired). Taste and add additional salt if needed and serve immediately.
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Notes
Raisins/Parmesan Cheese: Both are optional ingredients and add to this dish when served as a side. Choose one, not both.Remove Excess Liquid (crucial if adding to fillings in quiche, lasagna, etc). After sautéing the spinach, remove it from heat and it into a fine mesh colander, and gently push down with a wooden spoon to remove any liquid. Storage: Allow to cool, transfer to an airtight container, and store in the refrigerator for 3-4 days.