Add all ingredients, except the vinaigrette, in a 2 quart stock pot. Cover with a tight lid. Bring to a boil over high heat. Reduce heat to low and simmer 18 minutes. Allow to rest covered for 10 minutes.
1/2 cup bulgur, 1/2 cup black lentils, 2 cups water, 1 clove garlic, 2 sprigs fresh thyme, 1/4 teaspoon kosher salt, 1/4 teaspoon freshly ground black pepper