In a food processor, grind the oatmeal, set aside. Finely chop the onions.
In a small skillet heat 1 tablespoon olive oil. Add onions and cook for about 5 minutes, add garlic and Casa M Texas Twister spice. Sauté for a few minutes to open up the spices. Don't let the garlic burn.
If using chicken thighs, trim off visible fat. Place in food processor and process using the pulse button (or if you're using ground chicken, no need to process).
Preheat oven to 400°. Line 2 baking sheets with parchment paper.
In a large bowl combine: ground chicken, 2 tablespoons olive oil, onion mixture, ground oatmeal, chopped mushrooms, parmesan cheese, parsley, oregano, thyme, kosher salt and beaten egg.
Combine with spoon or use hands. Do not over mix, just combine until everything is distributed fairly evenly.
Using a small icecream scoop (1 1/2 inches in diameter) or use a spoon, scoop out chicken mixture and place on parchment paper. Round the balls if necessary with your hands. If you use your hands to roll the balls, wet them slightly to prevent sticking, and shape the mixture into perfectly portioned balls. If you make your meatballs smaller or larger, you will need to adjust the baking time.
Bake for about 13-15 min until temp reaches at least 165°. Serve hot or with sauce. These freeze extremely well. Cool completely before freezing. Makes about 46 meatballs using the 1 1/2 inch scoop.
Serve these meatballs hot, over a bed of fresh greens or with a side of fluffy cauliflower rice, for a light yet satisfying meal.