1. Bring a large pot of salted filtered water to a boil and cook the quinoa for 10 minutes. Drain and rinse with cold water.
2. Pour the lentils into a saucepan and cover with filtered water. Bring to a boil and cook covered for 15 minutes. Drain and rinse with cold water.
3. Pour the lentils and quinoa into a salad bowl. Add the cherry tomatoes cut into quarters, arugula, oil, and lemon juice. Mix well and refrigerate for at least 1 hour.
4. When serving, add small cubes of fresh cheese to the salad.