Gluten Free Multigrain Bread

Name: Gluten-Free Multigrain Bread
Ingredients: 1 teaspoon butter, or as needed; 3/4 cup brown rice flour; 1/4 cup tapioca starch; 1/4 cup potato starch; 2 teaspoons active dry yeast; 2 teaspoons guar gum; 1 teaspoon salt; 1 teaspoon baking powder; 1/4 cup quinoa; 1/4 cup sunflower seeds; 1/4 cup toasted almonds, chopped; 1/4 cup flax seeds; 3/4 cup warm milk (115 degrees F or 46 degrees C); 2 eggs; 2 egg whites; 2 tablespoons molasses; 2 tablespoons agave nectar; 2 tablespoons olive oil; 2 teaspoons apple cider vinegar; 1 teaspoon sesame seeds (optional)