Mix quinoa burger with diced or crushed tomatoes, tomato paste, quick oats, and nutritional yeast flakes. Stir well together.
In a mug or measuring cup, add 2 tablespoons of ground flaxseed in 6 tablespoons of hot water. Stir together for a minute or two until the mixture turns into a gel. Add this to the burger mixture.
Stir in the seasonings. Let set for 5 minutes, if desired.
Form into patties and fry on on a non-stick griddle or skillet. It will only take a few minutes for each side.
Serve on a bun with your favorite burger fixings (i.e. lettuce, onion rings, tomato slices) or serve separately as an entree. These make wonderful sandwiches for lunch or a delicious main dish for dinner. If making a large batch, you can also freeze them for later.