Heat 1 tbsp oil in a large skillet over medium heat. Add mushrooms in a single layer. Sauté until crispy on both sides. Remove to a paper towel and season with a sprinkle of salt and pepper.
In the same skillet, add remaining oil. Add onion and sauté until translucent, about 4-5 minutes. Season with salt and pepper. Add the crushed garlic and stir. Add ground beef and break it up into chunks. Add 1 tbsp boiling water, using a fork to break up the meat while sautéing it. The boiling water helps the meat break down easier.
Season meat with salt and pepper. Sauté for 6-8 minutes. Season with paprika and cumin.