Morning Glory Baked Oatmeal

Name: Morning Glory Baked Oatmeal
Ingredients: 3 Tbsp. melted unsalted butter, plus more room temperature for pan; 1 large egg; Zest of 1 orange; ½ cup fresh orange juice; 2 cups milk; ⅓ cup pure maple syrup; 1 tsp. vanilla extract; 1 tsp. Diamond Crystal or ½ tsp. Morton kosher salt; 1 tsp. ground cinnamon; ½ tsp. ground ginger; 2 cups old-fashioned oats; ½ cup steel-cut oats; 1 cup grated apple (about 1 medium); 1 cup grated carrot (about 1 large); ½ cup golden or other raisins; 1 tsp. baking powder; ½ cup chopped pecans, plus more for serving; Heavy cream or milk