Shaved Vegetable Salad with Apples and Lemony Tahini Dressing

Name: Shaved Vegetable Salad with Apples and Lemony Tahini Dressing
Ingredients: For the salad:; 1 bunch small beets with greens; 3 young carrots, peeled; 4 large radishes; 1/2 bulb fennel, trimmed with fronds reserved; 1/2 small red onion; 1 small head boy choy; 1 large apple; sea salt and extra-virgin olive oil, as needed; For the lemony tahini dressing:; juice of 1 lemon (roughly 1/3 cup); 4 cloves garlic, minced; 2 tablespoons minced red onion; sea salt, to taste; 1/3 cup tahini; 2 tablespoons extra-virgin olive oil; freshly ground black pepper, to taste