How to Make It
Heat a small saucepan over medium-high heat. Add 1 teaspoon oil; swirl to coat. Add quinoa; cook 2 minutes or until lightly toasted, stirring frequently. Gradually stir in stock; bring to a boil. Cover, reduce heat, and simmer 13 minutes or until quinoa is tender. Remove from heat; stir in 1/4 teaspoon salt. Cool the quinoa to room temperature.
Combine remaining 5 teaspoons oil, remaining 1/4 teaspoon salt, juice, pepper, sugar, and garlic in a small bowl; stirring with a whisk.
Place about 1 tablespoon dressing in each of 4 pint-sized jars with lids. Layer 1/2 cup arugula, one-fourth of quinoa mixture, 1/4 cup cucumber, 2 tablespoons onion, 1/4 cup tomato, and 3 tablespoons parsley in each jar. Close lid; refrigerate up to 24 hours. Shake before serving.