Start quinoa. Cook according to package directions. While quinoa is cooking, preheat oven to 350°F and line a baking sheet with parchment paper.

Prepare vegetables. Chop onion, garlic, and mushroom and grate zucchini. Heat a sauté pan over medium and add the oil.

Cook vegetables. Start with onion, then add garlic, then mushroom and zucchini. Add optional red pepper flakes. Cook until mushrooms and zucchini are soft. Set aside. Quinoa should be finished by now.

In a large mixing bowl, beat the egg. Add the quinoa, oats, and prepared vegetables. When adding the vegetables, try to avoid pouring in the excess liquid.

Add salt and pepper, and stir to combine. Shape the patties with your hands and place on the baking sheet. Cook for 25 minutes, and either serve warm or cool completely before freezing. To freeze, line a container with parchment/wax paper and place patties in layers between parchment papers.