French Toast with Orange Yogurt

Name: French Toast with Orange Yogurt
Ingredients: 1/2 Cup Greek yogurt; Finely grated zest of half an orange; 1 Tablespoon orange juice; 1 Tablespoon confectioners’ sugar; 10 Ounces mixed frozen berries; 1/3 Cup superfine sugar; 2 Teaspoons lemon juice; 8 whole star anise, blitzed in a spice grinder into a fine powder; 1/4 Cup superfine sugar; 5 eggs; 3/4 Cups whole milk; 14 Ounces brioche loaf, ends trimmed, cut into six (one-and-a-quarter-inch) slices; 1/3 Cup unsalted butter, fridge-cold, cut into thre-quarters of an inch dice