Master Top 10 Fillable Foods Fillable Foods - A vibrant, nutritious salad bowl featuring a colorful mix of beans, cherry tomatoes, avocado, and a perfectly soft-boiled egg, topped with creamy yogurt and a sprinkle of oats, paired with fresh tomatoes on the side. Top fillable foods typically combine high fibre, protein, and healthy fats, which contribute to satiety. Here are some of the most filling foods: 1. Oats : High in fibre and can be a great base for various toppings.