Ahi Tuna Nicoise Salad with Olive Oil–Dill Aioli

Name: Ahi Tuna Nicoise Salad with Olive Oil–Dill Aioli
Ingredients: 1 garlic clove; Kosher salt; 1 egg plus 1 egg yolk; 1/2 cup (4 fl. oz./125 ml) canola oil; 1/2 cup (4 fl. oz./125 ml) olive oil; 2 Tbs. chopped fresh dill; 3/4 lb. (375 g) baby Dutch yellow or small red potatoes, halved; 5 oz. (155 g) haricots verts; 2 cups (12 oz./375 g) cherry tomatoes; 4 Tbs. (2 fl. oz./60 ml) olive oil; Kosher salt and freshly ground pepper; 2 ahi tuna steaks (about 1/2 lb./250 g each); 1 cup (5 oz./155 g) pitted Niçoise olives; 3 hard-boiled eggs, peeled and halved (optional); 1 lemon, cut into wedges