Arugula Microgreen Quinoa Salad

Ingredients:

1. 1 cup cooked quinoa, cooled
2. 1/2 cup cherry tomatoes, halved
3. 1/4 cup crumbled feta cheese
4. 2 tbsp olive oil, 1 tbsp red wine vinegar, 1 tsp Dijon mustard
5. 2 large handfuls arugula microgreens
6. Salt and pepper to taste