In a small bowl, whisk together 2 cloves minced garlic, 1 minced shallot, 3 tablespoons red wine vinegar, and 1 tablespoon Dijon mustard. Gradually add ½ cup (4 fl oz/ 125 ml) olive oil, whisking constantly to form an emulsion. Season to taste with salt and pepper. Let the vinaigrette stand for at least 30 minutes to blend the flavors.