Oat Flour and pecan - grains, almond flour or other nut flours help to ensure that the patties do not fall apart. Watch out for gluten-free oats if you eat gluten-free. Tomato paste - Tomatoes are not only a natural flavor enhancer, but also help ensure that the burger patty does not fall apart. Flaxseed or chia seeds - these seeds also help keep the burgers from falling apart while searing. Flaxseed and chia seeds are often used as an egg substitute in vegan cuisine, and they still provide you with omega 3.