Add the olive oil, red wine vinegar, chives, dry mustard, Italian seasoning, garlic, salt, and pepper in a jar with a tight-fitting lid. Shake until combined. (you can also whisk these ingredients in a small bowl)
1/2 cup extra virgin olive oil, 1/2 cup red wine vinegar, 3 Tablespoons chives, chopped, 1/2 teaspoon dry ground mustard, 2 teaspoons Italian seasoning, 2 cloves garlic, pressed or minced, 1 teaspoon sea salt, 1/2 teaspoon fresh ground pepper