Grilled artichoke salad
For the dressing
Preheat the grill until hot. Season the artichoke hearts with salt and pepper, and brush with olive oil. Grill until charred round the edges.
To make the dressing, put the oils, vinegar, sugar, mustard powder and garlic into a large screwtop glass jar. Seal the jar and shake well. Season with salt and pepper.
Toss the lettuces in the dressing with the artichokes, and serve.