Begin by preheating a large pot over medium heat and adding the olive oil.
Brown the ground beef in the heated pot, occasionally stirring until it is cooked through and no longer pink. Season with salt and pepper to taste.
Add the conchas shells, garlic, tomatoes, chicken broth, tomato sauce and cumin. Stir to combine.
Reduce the heat to low and simmer for 20 minutes, stirring occasionally.
Add in the oregano, carrots, zucchini and bay leaves. Simmer for an additional 15 minutes or until conchitas shells are tender.
Lastly, add the white onion and simmer for 5 minutes or until softened.
Serve over cooked white rice.