Cook oats per instructions on package (4 parts liquid:1 part oats) and set aside.
Pepper puree
In a high speed blender, add the charred poblano and chili pepper. Add some of the reduced stock to create a smooth puree.
Chili
Add oil to a hot pan over medium-low temperature.
Add mushrooms until golden brown. Remove and set aside.
Add yellow onions, red onions, carrots, and garlic, and stir until caramelized. Add minced garlic towards the end to avoid burning.
Add all of the spices and coat the caramelized vegetables.
Add beans, tomatoes, browned mushrooms and stir well to incorporate.
Add pepper puree and continue stirring.
Add remaining reduced stock, bring to a boil then reduce to a simmer and reduce by ¾ for approximately 30-45 minutes. Stir occasionally to prevent sticking. Chili should be a thick liquid.
Mix in the oats until thoroughly incorporated.
Garnish
Add a dollop of Greek yogurt, shredded cheddar cheese, and diced onions on top of each serving,