Tropical Ambrosia

Name: Tropical Ambrosia
Ingredients: 2 tablespoons sour cream; 2 tablespoons heavy cream, whipped to stiff peaks (optional); 1 tablespoon brown sugar; 1 teaspoon lime juice; 1 cup mango, chopped; 1 cup pineapple, chopped; 1 kiwi, chopped; 2 tablespoons shredded coconut, or more to taste; 2 mint leaves, sliced into thin ribbons (optional); 1/2 cup mini marshmallows (optional); 1 tablespoon flaked coconut, toasted; 1/4 teaspoon poppy seeds or chia seeds (optional); finely grated lime zest, just a sprinkle over top