Carrot Cake Oatmeal

Name: Carrot Cake Oatmeal
Ingredients: 2 medium carrots, coarsely grated (about 1 cup); 1 cup old-fashioned oats; ¼ cup raisins; 2 tablespoons dark brown sugar; 1 teaspoon ground cinnamon; ¼ teaspoon ground ginger; 1 teaspoon vanilla extract; ½ teaspoon kosher salt; ¼ cup chopped walnuts, plus more for serving; ½ cup unsweetened almond milk, another nut milk, or regular whole milk; Plain Greek yogurt, pumpkin seeds, unsweetened shredded coconut flakes, and/or pure maple syrup for serving)