Venetian fritters

Name: Venetian fritters
Ingredients: 3 1/3 cups all purpose (AP) flour (400 gr); 1/2 tablespoon dried beer yeast (5 gr; or 10 gr fresh yeast); 1/2 cup water (120 ml, warm); 3 tablespoons sugar (plus more to garnish the fritters); 2 eggs (medium size); 2 cups milk (approx; 240 ml); 1 tablespoon rum; 1 lemon (grated zest only); 1 pinch salt; 1/2 cup raisin (100 gr; or 1/4 cup raisins and 1/4 cup pine nuts); 2 cups peanut oil (500 ml; for frying); 1/2 cup custard (optional, to fill the fritters)