Preheat the oven to 400'F
Peel the sweet potatoes and slice into wedges, similar to steak fries. Place them on a baking sheet and drizzle with some olive oil. Some salt and pepper. Place in the oven and bake for 30-45 minutes, or until they are cooked but still firm.
Place all the dressing ingredients in a small bowl with 1/2 teaspoon salt and 1/4 teaspoon black pepper and whisk - set aside.
Once the sweet potatoes are cooked, let them cool on the sheet before putting them in a large serving bowl along with the arugula, tomatoes, avocado, and herbs. Drizzle the dressing over the salad and toss well to combine.
Slice the Halloumi aka as squeaky cheese into 8 rectangular pieces. Heat some vegetable oil in a frying pan over medium-high heat. Fry the halloumi for a couple of minutes on each side until they are golden brown and seared. Arrange them on top of the salad and serve immediately.