Chilean Corn and Beef Casserole

Name: Chilean Corn and Beef Casserole
Cuisine: American, TexMex
Ingredients: 4 cups of fresh corn kernels (or frozen, thawed); 1/4 cup whole milk; 2 tablespoons unsalted butter; 1 tablespoon granulated sugar (optional, depending on corn sweetness); 1/2 teaspoon salt; For the Beef Filling; 2 tablespoons olive oil; 1 medium onion, finely chopped; 2 garlic cloves, minced; 1 pound ground beef; 1 teaspoon paprika; 1/2 teaspoon cumin; 1/4 teaspoon chili powder (optional for spice); 1/2 cup beef stock or water; Salt and pepper to taste; 1/2 cup cooked shredded chicken (optional); 8 black olives, pitted; 2 hardboiled eggs, sliced; 2 tablespoons raisins (optional, for sweetness); Sugar for sprinkling (optional)