Peel the sweet potatoes and cut into bite-sized pieces. Marinate with half of the olive oil, rosemary and salt to taste. The best way to do this is to mix everything in a large bowl with your hands.
Spread the seasoned potato pieces on two baking sheets (use baking paper) and bake in the oven at about 160 degrees fan-assisted until the pieces are browned.
Meanwhile, prepare the salad dressing from the remaining oil, vinegar, honey, pressed garlic, pepper and salt, to taste and a little chopped rosemary (it also tastes good if you make the dressing with lime olive oil). Put the baked sweet potato pieces in a bowl and pour the salad dressing over them and carefully fold in.