Set out a pint jar. Place the oil, lemon juice and zest, vinegar, Dijon mustard, oregano, and minced garlic in the jar.
Cover and shake well to emulsify. Add the crumbled feta, if using, and shake again.
Taste, then add salt and pepper as needed. (I usually add about ½ teaspoon salt and ¼ teaspoon fresh cracked pepper.)
Video
Notes
To store, cover and refrigerate for up to 3 weeks. When ready to use, remove the lid and warm in the microwave, just long enough to soften the oil… Not to heat the dressing. Then cover and shake.