Heat oil in a casserole dish and brown the ground beef with a pinch of salt.
2
Prepare the vegetables: chop the garlic and onion, cut green beans into three pieces each, peel and slice carrots into strips and squares, cut celery into small pieces.
3
Add the chopped garlic, onion, and serrano peppers to the browning meat—keep the peppers whole without cutting. Add marjoram and thyme and let the flavors develop.
4
Stir in the washed rice and let it combine with the meat.
5
Add the green beans, carrots, and celery, and let them cook thoroughly.
6
Pour in the preheated water, add more salt to taste, and bring the broth to a boil.
7
Once the broth has been boiling for a while, add the chopped potatoes and cilantro, and simmer until everything is fully cooked through.
8
Ladle the broth into bowls and serve. Add avocado on the side if desired.