In a medium bowl, combine the olive oil, lemon juice, minced garlic, and dried oregano. Sprinkle in salt, black pepper, and red pepper flakes. Whisk until combined.

Continue to whisk for about 30 seconds until all ingredients are well blended. Alternatively, shake in a mason jar for about 1 minute.

Taste and adjust flavors as needed, adding more lemon juice or salt to suit your preference.

Transfer to an airtight container and store in the refrigerator for up to 5 days.

For best flavor, let the dressing chill in the refrigerator for at least 30 minutes before serving.

Shake well before each use to restore emulsified texture.