Rinse and chop the produce accordingly. Preheat oven to 400 ̊F. Line 1 baking tray.
Make the salad. Add the red onion, cucumber, olives, and cherry tomatoes to a bowl. Add 2 tbsp. olive oil, 1 tbsp. red wine vinegar, 1 tbsp. dried oregano, 1 tbsp. dried basil, and add salt/black pepper to taste. Mix well and set the salad aside until ready to plate.
Set a pan to medium heat. Add 1 tbsp. olive oil. Once hot, add red onion. Cook for 3-4 minutes, until slightly softened. Then, add garlic, a pinch of salt, and cook for 1 minute more, until fragrant.
Add all ingredients to a bowl except the oat flour, and begin to combine. Once mixed evenly, slowly add the oat flour to incorporate it evenly. Season with salt and pepper if needed.
Begin to form patties 1⁄2 inch thick. Place them on a lined baking tray.
Bake for 20-25 minutes, until outer layer is crispy and inside is soft.
Serve with Greek salad, and place falafel inside pita or taco shell. Enjoy!