Place the chipotle peppers and juice of 1 of the limes in a food processor. Blitz until smooth. Transfer to a bowl and set aside.
Heat the olive oil in a large, deep skillet until shimmering. Add the onion along with a healthy pinch of salt. Lower the temperature and sweat the onions for 10 minutes or until translucent. Not browned. Add 3 cloves of the garlic and saute until fragrant, about 2-3 minutes more.
Increase the heat to medium and add the mushrooms along with another pinch of salt. Saute until the mushrooms are well browned, about 10 minutes.
Pour the chipotle puree into the skillet along with the can of tomatoes, stock, oregano, and cumin. Increase the temperature and bring the mixture to a boil. Reduce to a simmer and cook uncovered for 15-20 minutes or until the sauce has reduced to a jammy consistency. Take the mushrooms off of the heat and keep warm until ready to serve.
While the mushrooms are simmering, place the avocado, cherry tomatoes, jalapenos, cilantro, salt, the remaining lime juice and the remaining clove of garlic in a large bowl. Toss to combine. Set aside.
To build the bowl, create an even layer of Cumin Lime Rice on the bottom of the bowl. Spoon the mushrooms on top, and the avocado salsa beside the mushrooms. Add 6-7 rings of the pickled red onions, and a handful of tortilla chips. Finish the bowl with crumbled feta and additional cilantro. Serve immediately with hot sauce.