Second City Diner Burger

From the Healthiest Diet on the Planet
4 c water
1 chopped finely onion
3 stalks finely chopped celery
1/4 c coconut aminos
2 tsp onion powder
2 tsp garlic powder
1/2 tsp black pepper
3 c rolled oats
12 oz finely chopped mushrooms
1/2 c white whole wheat flour
Simmer onion, celery, aminos, onion and garlic powders in water for 5 min. Stir in oats, mushrooms and flour and cook 5 more minutes. Chill 1 hour or more.
Oven 350 degrees
Shape mixture into burger size patties and put on baking sheets. Bake 15 minutes. Remove from oven and let rest (very fragile!) Carefully flip over and bake 10 more minutes.
Before serving, grill on nonstick griddle about 7 min on each side until brown.